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Finding the Fourth Proportional to 261,881.17, 392,759.47 and 72,337.34

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Solution

The fourth proportional to 261,881.17, 392,759.47 and 72,337.34 is: 108,488.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,881.17 : 392,759.47 = 72,337.34 : x
  2. Step 2: Convert to fraction form
    261,881.17/392,759.47 = 72,337.34/x
  3. Step 3: Cross multiply
    261,881.17x = 392,759.47 × 72,337.34
  4. Step 4: Simplify right side
    261,881.17x = 28,411,175,319.61
  5. Step 5: Solve for x
    x = 28,411,175,319.61/261,881.17
  6. Step 6: Final answer
    x = 108,488.81

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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.