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Finding the Fourth Proportional to 321,872.60, 482,808.90 and 85,251.80

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Solution

The fourth proportional to 321,872.60, 482,808.90 and 85,251.80 is: 127,877.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,872.60 : 482,808.90 = 85,251.80 : x
  2. Step 2: Convert to fraction form
    321,872.60/482,808.90 = 85,251.80/x
  3. Step 3: Cross multiply
    321,872.60x = 482,808.90 × 85,251.80
  4. Step 4: Simplify right side
    321,872.60x = 41,160,327,781.02
  5. Step 5: Solve for x
    x = 41,160,327,781.02/321,872.60
  6. Step 6: Final answer
    x = 127,877.70

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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.