Finding the Fourth Proportional to 138,045.20, 207,067.80 and 132,213.20
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Solution
The fourth proportional to 138,045.20, 207,067.80 and 132,213.20 is: 198,319.80
Step by Step Solution
- Step 1: Write the proportion equation
138,045.20 : 207,067.80 = 132,213.20 : x - Step 2: Convert to fraction form
138,045.20/207,067.80 = 132,213.20/x - Step 3: Cross multiply
138,045.20x = 207,067.80 × 132,213.20 - Step 4: Simplify right side
138,045.20x = 27,377,096,454.96 - Step 5: Solve for x
x = 27,377,096,454.96/138,045.20 - Step 6: Final answer
x = 198,319.80
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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.