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Finding the Fourth Proportional to 206,979.28, 310,209.20 and 88,511.30

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Solution

The fourth proportional to 206,979.28, 310,209.20 and 88,511.30 is: 132,655.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,979.28 : 310,209.20 = 88,511.30 : x
  2. Step 2: Convert to fraction form
    206,979.28/310,209.20 = 88,511.30/x
  3. Step 3: Cross multiply
    206,979.28x = 310,209.20 × 88,511.30
  4. Step 4: Simplify right side
    206,979.28x = 27,457,019,563.96
  5. Step 5: Solve for x
    x = 27,457,019,563.96/206,979.28
  6. Step 6: Final answer
    x = 132,655.88

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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.