Home / 138,778.17-191,514.45-75,115.97

Finding the Fourth Proportional to 138,778.17, 191,514.45 and 75,115.97

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Solution

The fourth proportional to 138,778.17, 191,514.45 and 75,115.97 is: 103,660.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,778.17 : 191,514.45 = 75,115.97 : x
  2. Step 2: Convert to fraction form
    138,778.17/191,514.45 = 75,115.97/x
  3. Step 3: Cross multiply
    138,778.17x = 191,514.45 × 75,115.97
  4. Step 4: Simplify right side
    138,778.17x = 14,385,792,723.19
  5. Step 5: Solve for x
    x = 14,385,792,723.19/138,778.17
  6. Step 6: Final answer
    x = 103,660.34

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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.