Finding the Fourth Proportional to 138,306.20, 207,459.30 and 123,531.80
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Solution
The fourth proportional to 138,306.20, 207,459.30 and 123,531.80 is: 185,297.70
Step by Step Solution
- Step 1: Write the proportion equation
138,306.20 : 207,459.30 = 123,531.80 : x - Step 2: Convert to fraction form
138,306.20/207,459.30 = 123,531.80/x - Step 3: Cross multiply
138,306.20x = 207,459.30 × 123,531.80 - Step 4: Simplify right side
138,306.20x = 25,627,820,755.74 - Step 5: Solve for x
x = 25,627,820,755.74/138,306.20 - Step 6: Final answer
x = 185,297.70
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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.