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Finding the Fourth Proportional to 391,711.42, 587,581.05 and 125,437.33

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Solution

The fourth proportional to 391,711.42, 587,581.05 and 125,437.33 is: 188,160.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,711.42 : 587,581.05 = 125,437.33 : x
  2. Step 2: Convert to fraction form
    391,711.42/587,581.05 = 125,437.33/x
  3. Step 3: Cross multiply
    391,711.42x = 587,581.05 × 125,437.33
  4. Step 4: Simplify right side
    391,711.42x = 73,704,598,070.60
  5. Step 5: Solve for x
    x = 73,704,598,070.60/391,711.42
  6. Step 6: Final answer
    x = 188,160.45

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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.