Home / 138,691.20-191,332.96-81,301.44

Finding the Fourth Proportional to 138,691.20, 191,332.96 and 81,301.44

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Solution

The fourth proportional to 138,691.20, 191,332.96 and 81,301.44 is: 112,160.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,691.20 : 191,332.96 = 81,301.44 : x
  2. Step 2: Convert to fraction form
    138,691.20/191,332.96 = 81,301.44/x
  3. Step 3: Cross multiply
    138,691.20x = 191,332.96 × 81,301.44
  4. Step 4: Simplify right side
    138,691.20x = 15,555,645,167.46
  5. Step 5: Solve for x
    x = 15,555,645,167.46/138,691.20
  6. Step 6: Final answer
    x = 112,160.29

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1.5x scale

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.