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Finding the Fourth Proportional to 391,373.91, 587,011.86 and 125,112.33

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Solution

The fourth proportional to 391,373.91, 587,011.86 and 125,112.33 is: 187,652.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,373.91 : 587,011.86 = 125,112.33 : x
  2. Step 2: Convert to fraction form
    391,373.91/587,011.86 = 125,112.33/x
  3. Step 3: Cross multiply
    391,373.91x = 587,011.86 × 125,112.33
  4. Step 4: Simplify right side
    391,373.91x = 73,442,421,542.23
  5. Step 5: Solve for x
    x = 73,442,421,542.23/391,373.91
  6. Step 6: Final answer
    x = 187,652.83

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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.