Finding the Fourth Proportional to 139.92, 209.68 and 62.72
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Solution
The fourth proportional to 139.92, 209.68 and 62.72 is: 93.99
Step by Step Solution
- Step 1: Write the proportion equation
139.92 : 209.68 = 62.72 : x - Step 2: Convert to fraction form
139.92/209.68 = 62.72/x - Step 3: Cross multiply
139.92x = 209.68 × 62.72 - Step 4: Simplify right side
139.92x = 13,151.13 - Step 5: Solve for x
x = 13,151.13/139.92 - Step 6: Final answer
x = 93.99
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.