Finding the Fourth Proportional to 71.50, 107.27 and 38.99
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Solution
The fourth proportional to 71.50, 107.27 and 38.99 is: 58.50
Step by Step Solution
- Step 1: Write the proportion equation
71.50 : 107.27 = 38.99 : x - Step 2: Convert to fraction form
71.50/107.27 = 38.99/x - Step 3: Cross multiply
71.50x = 107.27 × 38.99 - Step 4: Simplify right side
71.50x = 4,182.46 - Step 5: Solve for x
x = 4,182.46/71.50 - Step 6: Final answer
x = 58.50
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.