Home / 138,650.22-191,249.16-90,906.66

Finding the Fourth Proportional to 138,650.22, 191,249.16 and 90,906.66

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Solution

The fourth proportional to 138,650.22, 191,249.16 and 90,906.66 is: 125,393.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,650.22 : 191,249.16 = 90,906.66 : x
  2. Step 2: Convert to fraction form
    138,650.22/191,249.16 = 90,906.66/x
  3. Step 3: Cross multiply
    138,650.22x = 191,249.16 × 90,906.66
  4. Step 4: Simplify right side
    138,650.22x = 17,385,822,363.41
  5. Step 5: Solve for x
    x = 17,385,822,363.41/138,650.22
  6. Step 6: Final answer
    x = 125,393.40

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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.