Finding the Fourth Proportional to 138,497.72, 207,781.50 and 38,657.80
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Solution
The fourth proportional to 138,497.72, 207,781.50 and 38,657.80 is: 57,996.45
Step by Step Solution
- Step 1: Write the proportion equation
138,497.72 : 207,781.50 = 38,657.80 : x - Step 2: Convert to fraction form
138,497.72/207,781.50 = 38,657.80/x - Step 3: Cross multiply
138,497.72x = 207,781.50 × 38,657.80 - Step 4: Simplify right side
138,497.72x = 8,032,375,670.70 - Step 5: Solve for x
x = 8,032,375,670.70/138,497.72 - Step 6: Final answer
x = 57,996.45
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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.