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Finding the Fourth Proportional to 66,404.26, 99,606.19 and 20,815.44

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Solution

The fourth proportional to 66,404.26, 99,606.19 and 20,815.44 is: 31,223.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,404.26 : 99,606.19 = 20,815.44 : x
  2. Step 2: Convert to fraction form
    66,404.26/99,606.19 = 20,815.44/x
  3. Step 3: Cross multiply
    66,404.26x = 99,606.19 × 20,815.44
  4. Step 4: Simplify right side
    66,404.26x = 2,073,346,671.57
  5. Step 5: Solve for x
    x = 2,073,346,671.57/66,404.26
  6. Step 6: Final answer
    x = 31,223.10

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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.