Home / 83,819.70-125,875.35-81,195.30

Finding the Fourth Proportional to 83,819.70, 125,875.35 and 81,195.30

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Solution

The fourth proportional to 83,819.70, 125,875.35 and 81,195.30 is: 121,934.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,819.70 : 125,875.35 = 81,195.30 : x
  2. Step 2: Convert to fraction form
    83,819.70/125,875.35 = 81,195.30/x
  3. Step 3: Cross multiply
    83,819.70x = 125,875.35 × 81,195.30
  4. Step 4: Simplify right side
    83,819.70x = 10,220,486,805.86
  5. Step 5: Solve for x
    x = 10,220,486,805.86/83,819.70
  6. Step 6: Final answer
    x = 121,934.18

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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.