Rangers’ rivals Celtic will face Inverness or Dunfermline in the fifth round.
Draw for fifth round of Scottish Cup:
Hibernian v Dundee/Kilmarnock
Motherwell v Greenock Morton
St Mirren/Hamilton Academical v Ross County
Inverness Caledonian Thistle/Dunfermline v Celtic
Ayr United v Falkirk
Rangers v Dundee United
Hearts v St Johnstone
Aberdeen v Queen of the South
