Home / 138,588.10-207,979.35-88,789.30

Finding the Fourth Proportional to 138,588.10, 207,979.35 and 88,789.30

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Solution

The fourth proportional to 138,588.10, 207,979.35 and 88,789.30 is: 133,246.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,588.10 : 207,979.35 = 88,789.30 : x
  2. Step 2: Convert to fraction form
    138,588.10/207,979.35 = 88,789.30/x
  3. Step 3: Cross multiply
    138,588.10x = 207,979.35 × 88,789.30
  4. Step 4: Simplify right side
    138,588.10x = 18,466,340,900.96
  5. Step 5: Solve for x
    x = 18,466,340,900.96/138,588.10
  6. Step 6: Final answer
    x = 133,246.22

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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.