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Finding the Fourth Proportional to 138,372.84, 207,357.28 and 61,342.88

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Solution

The fourth proportional to 138,372.84, 207,357.28 and 61,342.88 is: 91,924.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,372.84 : 207,357.28 = 61,342.88 : x
  2. Step 2: Convert to fraction form
    138,372.84/207,357.28 = 61,342.88/x
  3. Step 3: Cross multiply
    138,372.84x = 207,357.28 × 61,342.88
  4. Step 4: Simplify right side
    138,372.84x = 12,719,892,744.17
  5. Step 5: Solve for x
    x = 12,719,892,744.17/138,372.84
  6. Step 6: Final answer
    x = 91,924.78

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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.