Finding the Fourth Proportional to 71,657.12, 107,508.20 and 55,915.92
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Solution
The fourth proportional to 71,657.12, 107,508.20 and 55,915.92 is: 83,891.45
Step by Step Solution
- Step 1: Write the proportion equation
71,657.12 : 107,508.20 = 55,915.92 : x - Step 2: Convert to fraction form
71,657.12/107,508.20 = 55,915.92/x - Step 3: Cross multiply
71,657.12x = 107,508.20 × 55,915.92 - Step 4: Simplify right side
71,657.12x = 6,011,419,630.96 - Step 5: Solve for x
x = 6,011,419,630.96/71,657.12 - Step 6: Final answer
x = 83,891.45
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1.5x scale
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.