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Finding the Fourth Proportional to 138,687.39, 208,062.29 and 43,923.33

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Solution

The fourth proportional to 138,687.39, 208,062.29 and 43,923.33 is: 65,894.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,687.39 : 208,062.29 = 43,923.33 : x
  2. Step 2: Convert to fraction form
    138,687.39/208,062.29 = 43,923.33/x
  3. Step 3: Cross multiply
    138,687.39x = 208,062.29 × 43,923.33
  4. Step 4: Simplify right side
    138,687.39x = 9,138,788,404.61
  5. Step 5: Solve for x
    x = 9,138,788,404.61/138,687.39
  6. Step 6: Final answer
    x = 65,894.88

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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.