Finding the Fourth Proportional to 138,601.80, 207,902.70 and 129,853.80
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Solution
The fourth proportional to 138,601.80, 207,902.70 and 129,853.80 is: 194,780.70
Step by Step Solution
- Step 1: Write the proportion equation
138,601.80 : 207,902.70 = 129,853.80 : x - Step 2: Convert to fraction form
138,601.80/207,902.70 = 129,853.80/x - Step 3: Cross multiply
138,601.80x = 207,902.70 × 129,853.80 - Step 4: Simplify right side
138,601.80x = 26,996,955,625.26 - Step 5: Solve for x
x = 26,996,955,625.26/138,601.80 - Step 6: Final answer
x = 194,780.70
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1.5x scale
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.