Finding the Fourth Proportional to 100,519.12, 138,716.88 and 62,815.12
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Solution
The fourth proportional to 100,519.12, 138,716.88 and 62,815.12 is: 86,685.17
Step by Step Solution
- Step 1: Write the proportion equation
100,519.12 : 138,716.88 = 62,815.12 : x - Step 2: Convert to fraction form
100,519.12/138,716.88 = 62,815.12/x - Step 3: Cross multiply
100,519.12x = 138,716.88 × 62,815.12 - Step 4: Simplify right side
100,519.12x = 8,713,517,463.23 - Step 5: Solve for x
x = 8,713,517,463.23/100,519.12 - Step 6: Final answer
x = 86,685.17
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1.5x scale
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.