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Finding the Fourth Proportional to 225,081.87, 310,691.21 and 129,626.61

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Solution

The fourth proportional to 225,081.87, 310,691.21 and 129,626.61 is: 178,929.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,081.87 : 310,691.21 = 129,626.61 : x
  2. Step 2: Convert to fraction form
    225,081.87/310,691.21 = 129,626.61/x
  3. Step 3: Cross multiply
    225,081.87x = 310,691.21 × 129,626.61
  4. Step 4: Simplify right side
    225,081.87x = 40,273,847,660.97
  5. Step 5: Solve for x
    x = 40,273,847,660.97/225,081.87
  6. Step 6: Final answer
    x = 178,929.77

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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.