Solving Proportion Problems

Question 1:

x and y are in direct proportion. When x = 3, y = 36, find y when
x = 7.

84

Question 2:

x and y are in direct proportion. When x = 10, y = 60, find y when
x = 9.

54

Question 3:

x and y are in inverse proportion. When x = 6, y = 30, find y when
x = 2.

90

Question 4:

x and y are in inverse proportion. When x = 3, y = 117, find y when
x = 9.

39