Finding the Fourth Proportional to 101.38, 139.50 and 93.63
Calculator
Solution
The fourth proportional to 101.38, 139.50 and 93.63 is: 128.84
Step by Step Solution
- Step 1: Write the proportion equation
101.38 : 139.50 = 93.63 : x - Step 2: Convert to fraction form
101.38/139.50 = 93.63/x - Step 3: Cross multiply
101.38x = 139.50 × 93.63 - Step 4: Simplify right side
101.38x = 13,061.25 - Step 5: Solve for x
x = 13,061.25/101.38 - Step 6: Final answer
x = 128.84
Related Problems
Find fourth proportional to 50.69, 69.75 and 46.82
Half scale
Find fourth proportional to 202.75, 278.99 and 187.26
Double scale
Find fourth proportional to 102.38, 140.87 and 94.63
Similar ratio
Find fourth proportional to 152.06, 209.25 and 140.45
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.