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Finding the Fourth Proportional to 125,101.71, 172,652.69 and 71,394.81

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Solution

The fourth proportional to 125,101.71, 172,652.69 and 71,394.81 is: 98,531.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,101.71 : 172,652.69 = 71,394.81 : x
  2. Step 2: Convert to fraction form
    125,101.71/172,652.69 = 71,394.81/x
  3. Step 3: Cross multiply
    125,101.71x = 172,652.69 × 71,394.81
  4. Step 4: Simplify right side
    125,101.71x = 12,326,505,641.56
  5. Step 5: Solve for x
    x = 12,326,505,641.56/125,101.71
  6. Step 6: Final answer
    x = 98,531.87

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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.