Finding the Fourth Proportional to 71,811.20, 107,694.12 and 66,474.92
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Solution
The fourth proportional to 71,811.20, 107,694.12 and 66,474.92 is: 99,691.39
Step by Step Solution
- Step 1: Write the proportion equation
71,811.20 : 107,694.12 = 66,474.92 : x - Step 2: Convert to fraction form
71,811.20/107,694.12 = 66,474.92/x - Step 3: Cross multiply
71,811.20x = 107,694.12 × 66,474.92 - Step 4: Simplify right side
71,811.20x = 7,158,958,011.47 - Step 5: Solve for x
x = 7,158,958,011.47/71,811.20 - Step 6: Final answer
x = 99,691.39
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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.