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Finding the Fourth Proportional to 103,691.55, 155,470.37 and 56,931.87

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Solution

The fourth proportional to 103,691.55, 155,470.37 and 56,931.87 is: 85,361.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,691.55 : 155,470.37 = 56,931.87 : x
  2. Step 2: Convert to fraction form
    103,691.55/155,470.37 = 56,931.87/x
  3. Step 3: Cross multiply
    103,691.55x = 155,470.37 × 56,931.87
  4. Step 4: Simplify right side
    103,691.55x = 8,851,218,609.03
  5. Step 5: Solve for x
    x = 8,851,218,609.03/103,691.55
  6. Step 6: Final answer
    x = 85,361.04

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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.