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Finding the Fourth Proportional to 81,242.91, 121,819.70 and 25,067.70

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Solution

The fourth proportional to 81,242.91, 121,819.70 and 25,067.70 is: 37,587.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,242.91 : 121,819.70 = 25,067.70 : x
  2. Step 2: Convert to fraction form
    81,242.91/121,819.70 = 25,067.70/x
  3. Step 3: Cross multiply
    81,242.91x = 121,819.70 × 25,067.70
  4. Step 4: Simplify right side
    81,242.91x = 3,053,739,568.35
  5. Step 5: Solve for x
    x = 3,053,739,568.35/81,242.91
  6. Step 6: Final answer
    x = 37,587.77

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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.