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Finding the Fourth Proportional to 66,843.80, 100,265.70 and 27,429.20

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Solution

The fourth proportional to 66,843.80, 100,265.70 and 27,429.20 is: 41,143.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,843.80 : 100,265.70 = 27,429.20 : x
  2. Step 2: Convert to fraction form
    66,843.80/100,265.70 = 27,429.20/x
  3. Step 3: Cross multiply
    66,843.80x = 100,265.70 × 27,429.20
  4. Step 4: Simplify right side
    66,843.80x = 2,750,207,938.44
  5. Step 5: Solve for x
    x = 2,750,207,938.44/66,843.80
  6. Step 6: Final answer
    x = 41,143.80

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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.