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Finding the Fourth Proportional to 76,728.78, 115,060.17 and 26,793.90

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Solution

The fourth proportional to 76,728.78, 115,060.17 and 26,793.90 is: 40,179.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,728.78 : 115,060.17 = 26,793.90 : x
  2. Step 2: Convert to fraction form
    76,728.78/115,060.17 = 26,793.90/x
  3. Step 3: Cross multiply
    76,728.78x = 115,060.17 × 26,793.90
  4. Step 4: Simplify right side
    76,728.78x = 3,082,910,688.96
  5. Step 5: Solve for x
    x = 3,082,910,688.96/76,728.78
  6. Step 6: Final answer
    x = 40,179.33

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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.