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Finding the Fourth Proportional to 66,475.57, 99,691.68 and 22,090.40

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Solution

The fourth proportional to 66,475.57, 99,691.68 and 22,090.40 is: 33,128.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,475.57 : 99,691.68 = 22,090.40 : x
  2. Step 2: Convert to fraction form
    66,475.57/99,691.68 = 22,090.40/x
  3. Step 3: Cross multiply
    66,475.57x = 99,691.68 × 22,090.40
  4. Step 4: Simplify right side
    66,475.57x = 2,202,229,337.10
  5. Step 5: Solve for x
    x = 2,202,229,337.10/66,475.57
  6. Step 6: Final answer
    x = 33,128.40

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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.