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Finding the Fourth Proportional to 66,207.57, 99,311.39 and 19,493.25

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Solution

The fourth proportional to 66,207.57, 99,311.39 and 19,493.25 is: 29,239.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,207.57 : 99,311.39 = 19,493.25 : x
  2. Step 2: Convert to fraction form
    66,207.57/99,311.39 = 19,493.25/x
  3. Step 3: Cross multiply
    66,207.57x = 99,311.39 × 19,493.25
  4. Step 4: Simplify right side
    66,207.57x = 1,935,901,753.12
  5. Step 5: Solve for x
    x = 1,935,901,753.12/66,207.57
  6. Step 6: Final answer
    x = 29,239.89

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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.