Finding the Fourth Proportional to 101.18, 139.50 and 74.94
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Solution
The fourth proportional to 101.18, 139.50 and 74.94 is: 103.32
Step by Step Solution
- Step 1: Write the proportion equation
101.18 : 139.50 = 74.94 : x - Step 2: Convert to fraction form
101.18/139.50 = 74.94/x - Step 3: Cross multiply
101.18x = 139.50 × 74.94 - Step 4: Simplify right side
101.18x = 10,454.13 - Step 5: Solve for x
x = 10,454.13/101.18 - Step 6: Final answer
x = 103.32
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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.