Finding the Fourth Proportional to 129,394.38, 178,565.64 and 71,257.70
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Solution
The fourth proportional to 129,394.38, 178,565.64 and 71,257.70 is: 98,336.39
Step by Step Solution
- Step 1: Write the proportion equation
129,394.38 : 178,565.64 = 71,257.70 : x - Step 2: Convert to fraction form
129,394.38/178,565.64 = 71,257.70/x - Step 3: Cross multiply
129,394.38x = 178,565.64 × 71,257.70 - Step 4: Simplify right side
129,394.38x = 12,724,176,805.43 - Step 5: Solve for x
x = 12,724,176,805.43/129,394.38 - Step 6: Final answer
x = 98,336.39
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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.