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Finding the Fourth Proportional to 204,715.20, 306,999.90 and 92,449.20

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Solution

The fourth proportional to 204,715.20, 306,999.90 and 92,449.20 is: 138,640.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,715.20 : 306,999.90 = 92,449.20 : x
  2. Step 2: Convert to fraction form
    204,715.20/306,999.90 = 92,449.20/x
  3. Step 3: Cross multiply
    204,715.20x = 306,999.90 × 92,449.20
  4. Step 4: Simplify right side
    204,715.20x = 28,381,895,155.08
  5. Step 5: Solve for x
    x = 28,381,895,155.08/204,715.20
  6. Step 6: Final answer
    x = 138,640.88

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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.