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Finding the Fourth Proportional to 66,301.97, 99,462.13 and 21,324.60

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Solution

The fourth proportional to 66,301.97, 99,462.13 and 21,324.60 is: 31,989.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,301.97 : 99,462.13 = 21,324.60 : x
  2. Step 2: Convert to fraction form
    66,301.97/99,462.13 = 21,324.60/x
  3. Step 3: Cross multiply
    66,301.97x = 99,462.13 × 21,324.60
  4. Step 4: Simplify right side
    66,301.97x = 2,120,990,279.43
  5. Step 5: Solve for x
    x = 2,120,990,279.43/66,301.97
  6. Step 6: Final answer
    x = 31,989.85

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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.