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Finding the Fourth Proportional to 66,540, 99,821.88 and 22,169.28

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Solution

The fourth proportional to 66,540, 99,821.88 and 22,169.28 is: 33,257.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,540 : 99,821.88 = 22,169.28 : x
  2. Step 2: Convert to fraction form
    66,540/99,821.88 = 22,169.28/x
  3. Step 3: Cross multiply
    66,540x = 99,821.88 × 22,169.28
  4. Step 4: Simplify right side
    66,540x = 2,212,979,207.85
  5. Step 5: Solve for x
    x = 2,212,979,207.85/66,540
  6. Step 6: Final answer
    x = 33,257.88

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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.