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Finding the Fourth Proportional to 77,247.78, 115,691.85 and 75,119.64

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Solution

The fourth proportional to 77,247.78, 115,691.85 and 75,119.64 is: 112,504.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,247.78 : 115,691.85 = 75,119.64 : x
  2. Step 2: Convert to fraction form
    77,247.78/115,691.85 = 75,119.64/x
  3. Step 3: Cross multiply
    77,247.78x = 115,691.85 × 75,119.64
  4. Step 4: Simplify right side
    77,247.78x = 8,690,730,122.93
  5. Step 5: Solve for x
    x = 8,690,730,122.93/77,247.78
  6. Step 6: Final answer
    x = 112,504.59

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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.