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Finding the Fourth Proportional to 71,072.64, 106,614.09 and 20,469.60

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Solution

The fourth proportional to 71,072.64, 106,614.09 and 20,469.60 is: 30,705.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,072.64 : 106,614.09 = 20,469.60 : x
  2. Step 2: Convert to fraction form
    71,072.64/106,614.09 = 20,469.60/x
  3. Step 3: Cross multiply
    71,072.64x = 106,614.09 × 20,469.60
  4. Step 4: Simplify right side
    71,072.64x = 2,182,347,776.66
  5. Step 5: Solve for x
    x = 2,182,347,776.66/71,072.64
  6. Step 6: Final answer
    x = 30,705.88

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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.