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Finding the Fourth Proportional to 391,711.73, 587,581.52 and 125,437.65

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Solution

The fourth proportional to 391,711.73, 587,581.52 and 125,437.65 is: 188,160.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,711.73 : 587,581.52 = 125,437.65 : x
  2. Step 2: Convert to fraction form
    391,711.73/587,581.52 = 125,437.65/x
  3. Step 3: Cross multiply
    391,711.73x = 587,581.52 × 125,437.65
  4. Step 4: Simplify right side
    391,711.73x = 73,704,844,425.04
  5. Step 5: Solve for x
    x = 73,704,844,425.04/391,711.73
  6. Step 6: Final answer
    x = 188,160.93

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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.