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Finding the Fourth Proportional to 275,715.39, 412,991.87 and 126,081.61

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Solution

The fourth proportional to 275,715.39, 412,991.87 and 126,081.61 is: 188,856.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,715.39 : 412,991.87 = 126,081.61 : x
  2. Step 2: Convert to fraction form
    275,715.39/412,991.87 = 126,081.61/x
  3. Step 3: Cross multiply
    275,715.39x = 412,991.87 × 126,081.61
  4. Step 4: Simplify right side
    275,715.39x = 52,070,680,546.70
  5. Step 5: Solve for x
    x = 52,070,680,546.70/275,715.39
  6. Step 6: Final answer
    x = 188,856.63

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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.