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Finding the Fourth Proportional to 100,634.60, 138,818.31 and 62,376.68

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Solution

The fourth proportional to 100,634.60, 138,818.31 and 62,376.68 is: 86,044.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,634.60 : 138,818.31 = 62,376.68 : x
  2. Step 2: Convert to fraction form
    100,634.60/138,818.31 = 62,376.68/x
  3. Step 3: Cross multiply
    100,634.60x = 138,818.31 × 62,376.68
  4. Step 4: Simplify right side
    100,634.60x = 8,659,025,414.14
  5. Step 5: Solve for x
    x = 8,659,025,414.14/100,634.60
  6. Step 6: Final answer
    x = 86,044.22

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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.