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Finding the Fourth Proportional to 252,780.87, 379,044.29 and 84,242.15

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Solution

The fourth proportional to 252,780.87, 379,044.29 and 84,242.15 is: 126,320.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,780.87 : 379,044.29 = 84,242.15 : x
  2. Step 2: Convert to fraction form
    252,780.87/379,044.29 = 84,242.15/x
  3. Step 3: Cross multiply
    252,780.87x = 379,044.29 × 84,242.15
  4. Step 4: Simplify right side
    252,780.87x = 31,931,505,671.62
  5. Step 5: Solve for x
    x = 31,931,505,671.62/252,780.87
  6. Step 6: Final answer
    x = 126,320.89

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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.