Finding the Fourth Proportional to 71,992.40, 107,988.14 and 38,728.13
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Solution
The fourth proportional to 71,992.40, 107,988.14 and 38,728.13 is: 58,091.94
Step by Step Solution
- Step 1: Write the proportion equation
71,992.40 : 107,988.14 = 38,728.13 : x - Step 2: Convert to fraction form
71,992.40/107,988.14 = 38,728.13/x - Step 3: Cross multiply
71,992.40x = 107,988.14 × 38,728.13 - Step 4: Simplify right side
71,992.40x = 4,182,178,063.41 - Step 5: Solve for x
x = 4,182,178,063.41/71,992.40 - Step 6: Final answer
x = 58,091.94
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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.