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Finding the Fourth Proportional to 440,781.89, 661,172.90 and 125,197.79

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Solution

The fourth proportional to 440,781.89, 661,172.90 and 125,197.79 is: 187,796.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,781.89 : 661,172.90 = 125,197.79 : x
  2. Step 2: Convert to fraction form
    440,781.89/661,172.90 = 125,197.79/x
  3. Step 3: Cross multiply
    440,781.89x = 661,172.90 × 125,197.79
  4. Step 4: Simplify right side
    440,781.89x = 82,777,381,956.04
  5. Step 5: Solve for x
    x = 82,777,381,956.04/440,781.89
  6. Step 6: Final answer
    x = 187,796.70

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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.