Which quantity is proportional to 16⁄4? check all that are true. 64/16 6/1 5/1 48/12 4/1

We know that

16/4> 8/2> 4/1
so
case 1) 
64/16> 32/8> 16/4> 8/2> 4/1
the quantity (64/16) is proportional to 16/4

case 2)
6/1 is not 4/1
so
the quantity (6/1) is not proportional to 16/4

case 3)
5/1 is not 4/1
so
the quantity (5/1) is not proportional to 16/4

case 4)
48*12> 24/6> 12/3> 4/1
the quantity (48/12) is proportional to 16/4

case 5)
4/1 is equal to 4/1
so
the quantity (4/1) is proportional to 16/4

D