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Finding the Fourth Proportional to 83,195.40, 124,871.40 and 43,780.80

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Solution

The fourth proportional to 83,195.40, 124,871.40 and 43,780.80 is: 65,712.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,195.40 : 124,871.40 = 43,780.80 : x
  2. Step 2: Convert to fraction form
    83,195.40/124,871.40 = 43,780.80/x
  3. Step 3: Cross multiply
    83,195.40x = 124,871.40 × 43,780.80
  4. Step 4: Simplify right side
    83,195.40x = 5,466,969,789.12
  5. Step 5: Solve for x
    x = 5,466,969,789.12/83,195.40
  6. Step 6: Final answer
    x = 65,712.40

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1.5x scale

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.