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Finding the Fourth Proportional to 138,474.84, 207,629.06 and 54,134.55

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Solution

The fourth proportional to 138,474.84, 207,629.06 and 54,134.55 is: 81,169.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,474.84 : 207,629.06 = 54,134.55 : x
  2. Step 2: Convert to fraction form
    138,474.84/207,629.06 = 54,134.55/x
  3. Step 3: Cross multiply
    138,474.84x = 207,629.06 × 54,134.55
  4. Step 4: Simplify right side
    138,474.84x = 11,239,904,691.88
  5. Step 5: Solve for x
    x = 11,239,904,691.88/138,474.84
  6. Step 6: Final answer
    x = 81,169.29

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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.