Solving Proportion Problems

Question 1:

x and y are in direct proportion. When x = 10, y = 120, find y when
x = 7.

84

Question 2:

x and y are in direct proportion. When x = 4, y = 56, find y when
x = 7.

98

Question 3:

x and y are in inverse proportion. When x = 6, y = 5, find y when
x = 1.

30

Question 4:

x and y are in inverse proportion. When x = 8, y = 21, find y when
x = 7.

24