Finding the Fourth Proportional to 138,608,691.84, 191,277,679.68 and 76,727,721.60
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Solution
The fourth proportional to 138,608,691.84, 191,277,679.68 and 76,727,721.60 is: 105,882,974.29
Step by Step Solution
- Step 1: Write the proportion equation
138,608,691.84 : 191,277,679.68 = 76,727,721.60 : x - Step 2: Convert to fraction form
138,608,691.84/191,277,679.68 = 76,727,721.60/x - Step 3: Cross multiply
138,608,691.84x = 191,277,679.68 × 76,727,721.60 - Step 4: Simplify right side
138,608,691.84x = 14,676,300,554,781,016 - Step 5: Solve for x
x = 14,676,300,554,781,016/138,608,691.84 - Step 6: Final answer
x = 105,882,974.29
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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.