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Finding the Fourth Proportional to 82,267.20, 123,400.80 and 40,708.80

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Solution

The fourth proportional to 82,267.20, 123,400.80 and 40,708.80 is: 61,063.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,267.20 : 123,400.80 = 40,708.80 : x
  2. Step 2: Convert to fraction form
    82,267.20/123,400.80 = 40,708.80/x
  3. Step 3: Cross multiply
    82,267.20x = 123,400.80 × 40,708.80
  4. Step 4: Simplify right side
    82,267.20x = 5,023,498,487.04
  5. Step 5: Solve for x
    x = 5,023,498,487.04/82,267.20
  6. Step 6: Final answer
    x = 61,063.20

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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.