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Finding the Fourth Proportional to 66,456.60, 99,689.70 and 22,114.20

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Solution

The fourth proportional to 66,456.60, 99,689.70 and 22,114.20 is: 33,172.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,456.60 : 99,689.70 = 22,114.20 : x
  2. Step 2: Convert to fraction form
    66,456.60/99,689.70 = 22,114.20/x
  3. Step 3: Cross multiply
    66,456.60x = 99,689.70 × 22,114.20
  4. Step 4: Simplify right side
    66,456.60x = 2,204,557,963.74
  5. Step 5: Solve for x
    x = 2,204,557,963.74/66,456.60
  6. Step 6: Final answer
    x = 33,172.90

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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.