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Finding the Fourth Proportional to 138,606, 207,921.96 and 45,086.64

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Solution

The fourth proportional to 138,606, 207,921.96 and 45,086.64 is: 67,634.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,606 : 207,921.96 = 45,086.64 : x
  2. Step 2: Convert to fraction form
    138,606/207,921.96 = 45,086.64/x
  3. Step 3: Cross multiply
    138,606x = 207,921.96 × 45,086.64
  4. Step 4: Simplify right side
    138,606x = 9,374,502,558.61
  5. Step 5: Solve for x
    x = 9,374,502,558.61/138,606
  6. Step 6: Final answer
    x = 67,634.18

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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.