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Finding the Fourth Proportional to 281,868.62, 422,757.91 and 82,142.28

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Solution

The fourth proportional to 281,868.62, 422,757.91 and 82,142.28 is: 123,200.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,868.62 : 422,757.91 = 82,142.28 : x
  2. Step 2: Convert to fraction form
    281,868.62/422,757.91 = 82,142.28/x
  3. Step 3: Cross multiply
    281,868.62x = 422,757.91 × 82,142.28
  4. Step 4: Simplify right side
    281,868.62x = 34,726,298,718.11
  5. Step 5: Solve for x
    x = 34,726,298,718.11/281,868.62
  6. Step 6: Final answer
    x = 123,200.30

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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.