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Finding the Fourth Proportional to 138,610.63, 191,282.81 and 74,948.41

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Solution

The fourth proportional to 138,610.63, 191,282.81 and 74,948.41 is: 103,428.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,610.63 : 191,282.81 = 74,948.41 : x
  2. Step 2: Convert to fraction form
    138,610.63/191,282.81 = 74,948.41/x
  3. Step 3: Cross multiply
    138,610.63x = 191,282.81 × 74,948.41
  4. Step 4: Simplify right side
    138,610.63x = 14,336,342,469.83
  5. Step 5: Solve for x
    x = 14,336,342,469.83/138,610.63
  6. Step 6: Final answer
    x = 103,428.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.