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Finding the Fourth Proportional to 83,647.20, 125,616.60 and 81,022.80

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Solution

The fourth proportional to 83,647.20, 125,616.60 and 81,022.80 is: 121,675.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,647.20 : 125,616.60 = 81,022.80 : x
  2. Step 2: Convert to fraction form
    83,647.20/125,616.60 = 81,022.80/x
  3. Step 3: Cross multiply
    83,647.20x = 125,616.60 × 81,022.80
  4. Step 4: Simplify right side
    83,647.20x = 10,177,808,658.48
  5. Step 5: Solve for x
    x = 10,177,808,658.48/83,647.20
  6. Step 6: Final answer
    x = 121,675.43

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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.