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Finding the Fourth Proportional to 188,912.20, 282,712.20 and 129,863.20

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Solution

The fourth proportional to 188,912.20, 282,712.20 and 129,863.20 is: 194,343.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,912.20 : 282,712.20 = 129,863.20 : x
  2. Step 2: Convert to fraction form
    188,912.20/282,712.20 = 129,863.20/x
  3. Step 3: Cross multiply
    188,912.20x = 282,712.20 × 129,863.20
  4. Step 4: Simplify right side
    188,912.20x = 36,713,910,971.04
  5. Step 5: Solve for x
    x = 36,713,910,971.04/188,912.20
  6. Step 6: Final answer
    x = 194,343.78

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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.