Home / 83,820.20-125,876.10-81,195.80

Finding the Fourth Proportional to 83,820.20, 125,876.10 and 81,195.80

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Solution

The fourth proportional to 83,820.20, 125,876.10 and 81,195.80 is: 121,934.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,820.20 : 125,876.10 = 81,195.80 : x
  2. Step 2: Convert to fraction form
    83,820.20/125,876.10 = 81,195.80/x
  3. Step 3: Cross multiply
    83,820.20x = 125,876.10 × 81,195.80
  4. Step 4: Simplify right side
    83,820.20x = 10,220,610,640.38
  5. Step 5: Solve for x
    x = 10,220,610,640.38/83,820.20
  6. Step 6: Final answer
    x = 121,934.94

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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.