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Finding the Fourth Proportional to 261,881.73, 392,760.31 and 72,337.90

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Solution

The fourth proportional to 261,881.73, 392,760.31 and 72,337.90 is: 108,489.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,881.73 : 392,760.31 = 72,337.90 : x
  2. Step 2: Convert to fraction form
    261,881.73/392,760.31 = 72,337.90/x
  3. Step 3: Cross multiply
    261,881.73x = 392,760.31 × 72,337.90
  4. Step 4: Simplify right side
    261,881.73x = 28,411,456,028.75
  5. Step 5: Solve for x
    x = 28,411,456,028.75/261,881.73
  6. Step 6: Final answer
    x = 108,489.65

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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.