An early goal by Reece Meekums put Adam Hinshelwood’s National South team on their way to securing a last-eght spot and Callum Kealy and Ollie Pearce (twice) struck in the second half to make sure of the win.
It was a brave effort by Dean Cox’s Isthmian south east hosts and they now go back to focusing on their league campaign.
See Mike Gunn’s pictures from the match – played in wet and windy conditions – on this page and the ones linked. Get the latest Lancing and Worthing action in the Worthing Herald, out Thursday.
. Lancing v Worthing Sussex Senior Cup pictures by Mike Gunn (23).jpg
Action from Worthing FC's 4-0 win at Lancing FC in the third round of the Sussex Senior Cup Photo: Mike Gunn
. Lancing v Worthing Sussex Senior Cup pictures by Mike Gunn (24).jpg
Action from Worthing FC's 4-0 win at Lancing FC in the third round of the Sussex Senior Cup Photo: Mike Gunn
. Lancing v Worthing Sussex Senior Cup pictures by Mike Gunn (26).jpg
Action from Worthing FC's 4-0 win at Lancing FC in the third round of the Sussex Senior Cup Photo: Mike Gunn
. Lancing v Worthing Sussex Senior Cup pictures by Mike Gunn (25).jpg
Action from Worthing FC's 4-0 win at Lancing FC in the third round of the Sussex Senior Cup Photo: Mike Gunn
. Lancing v Worthing Sussex Senior Cup pictures by Mike Gunn (1).jpg
Action from Worthing FC's 4-0 win at Lancing FC in the third round of the Sussex Senior Cup Photo: Mike Gunn
. Lancing v Worthing Sussex Senior Cup pictures by Mike Gunn (22).jpg
Action from Worthing FC's 4-0 win at Lancing FC in the third round of the Sussex Senior Cup Photo: Mike Gunn
. Lancing v Worthing Sussex Senior Cup pictures by Mike Gunn (21).jpg
Action from Worthing FC's 4-0 win at Lancing FC in the third round of the Sussex Senior Cup Photo: Mike Gunn
. Lancing v Worthing Sussex Senior Cup pictures by Mike Gunn (20).jpg
Action from Worthing FC's 4-0 win at Lancing FC in the third round of the Sussex Senior Cup Photo: Mike Gunn
. Lancing v Worthing Sussex Senior Cup pictures by Mike Gunn (23).jpg
Action from Worthing FC's 4-0 win at Lancing FC in the third round of the Sussex Senior Cup Photo: Mike Gunn
. Lancing v Worthing Sussex Senior Cup pictures by Mike Gunn (19).jpg
Action from Worthing FC's 4-0 win at Lancing FC in the third round of the Sussex Senior Cup Photo: Mike Gunn
. Lancing v Worthing Sussex Senior Cup pictures by Mike Gunn (18).jpg
Action from Worthing FC's 4-0 win at Lancing FC in the third round of the Sussex Senior Cup Photo: Mike Gunn
1. Lancing v Worthing Sussex Senior Cup pictures by Mike Gunn (24).jpg
Action from Worthing FC's 4-0 win at Lancing FC in the third round of the Sussex Senior Cup Photo: Mike Gunn
2. Lancing v Worthing Sussex Senior Cup pictures by Mike Gunn (26).jpg
Action from Worthing FC's 4-0 win at Lancing FC in the third round of the Sussex Senior Cup Photo: Mike Gunn
3. Lancing v Worthing Sussex Senior Cup pictures by Mike Gunn (25).jpg
Action from Worthing FC's 4-0 win at Lancing FC in the third round of the Sussex Senior Cup Photo: Mike Gunn
4. Lancing v Worthing Sussex Senior Cup pictures by Mike Gunn (1).jpg
Action from Worthing FC's 4-0 win at Lancing FC in the third round of the Sussex Senior Cup Photo: Mike Gunn