Finding the Fourth Proportional to 138,489.84, 207,668.88 and 71,863.20
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Solution
The fourth proportional to 138,489.84, 207,668.88 and 71,863.20 is: 107,760.61
Step by Step Solution
- Step 1: Write the proportion equation
138,489.84 : 207,668.88 = 71,863.20 : x - Step 2: Convert to fraction form
138,489.84/207,668.88 = 71,863.20/x - Step 3: Cross multiply
138,489.84x = 207,668.88 × 71,863.20 - Step 4: Simplify right side
138,489.84x = 14,923,750,257.22 - Step 5: Solve for x
x = 14,923,750,257.22/138,489.84 - Step 6: Final answer
x = 107,760.61
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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.