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Finding the Fourth Proportional to 66,502.20, 99,731.70 and 22,121.40

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Solution

The fourth proportional to 66,502.20, 99,731.70 and 22,121.40 is: 33,174.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,502.20 : 99,731.70 = 22,121.40 : x
  2. Step 2: Convert to fraction form
    66,502.20/99,731.70 = 22,121.40/x
  3. Step 3: Cross multiply
    66,502.20x = 99,731.70 × 22,121.40
  4. Step 4: Simplify right side
    66,502.20x = 2,206,204,828.38
  5. Step 5: Solve for x
    x = 2,206,204,828.38/66,502.20
  6. Step 6: Final answer
    x = 33,174.91

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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.