Finding the Fourth Proportional to 128,575.28, 177,425.92 and 71,213.70
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Solution
The fourth proportional to 128,575.28, 177,425.92 and 71,213.70 is: 98,270.49
Step by Step Solution
- Step 1: Write the proportion equation
128,575.28 : 177,425.92 = 71,213.70 : x - Step 2: Convert to fraction form
128,575.28/177,425.92 = 71,213.70/x - Step 3: Cross multiply
128,575.28x = 177,425.92 × 71,213.70 - Step 4: Simplify right side
128,575.28x = 12,635,156,239.10 - Step 5: Solve for x
x = 12,635,156,239.10/128,575.28 - Step 6: Final answer
x = 98,270.49
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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.