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Finding the Fourth Proportional to 138,373.89, 207,422.14 and 54,018.06

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Solution

The fourth proportional to 138,373.89, 207,422.14 and 54,018.06 is: 80,972.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,373.89 : 207,422.14 = 54,018.06 : x
  2. Step 2: Convert to fraction form
    138,373.89/207,422.14 = 54,018.06/x
  3. Step 3: Cross multiply
    138,373.89x = 207,422.14 × 54,018.06
  4. Step 4: Simplify right side
    138,373.89x = 11,204,541,603.85
  5. Step 5: Solve for x
    x = 11,204,541,603.85/138,373.89
  6. Step 6: Final answer
    x = 80,972.95

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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.