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Finding the Fourth Proportional to 83,195.20, 124,792.80 and 82,320.40

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Solution

The fourth proportional to 83,195.20, 124,792.80 and 82,320.40 is: 123,480.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,195.20 : 124,792.80 = 82,320.40 : x
  2. Step 2: Convert to fraction form
    83,195.20/124,792.80 = 82,320.40/x
  3. Step 3: Cross multiply
    83,195.20x = 124,792.80 × 82,320.40
  4. Step 4: Simplify right side
    83,195.20x = 10,272,993,213.12
  5. Step 5: Solve for x
    x = 10,272,993,213.12/83,195.20
  6. Step 6: Final answer
    x = 123,480.60

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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.