Home / 138,320.30-207,480.45-85,176.20

Finding the Fourth Proportional to 138,320.30, 207,480.45 and 85,176.20

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Solution

The fourth proportional to 138,320.30, 207,480.45 and 85,176.20 is: 127,764.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,320.30 : 207,480.45 = 85,176.20 : x
  2. Step 2: Convert to fraction form
    138,320.30/207,480.45 = 85,176.20/x
  3. Step 3: Cross multiply
    138,320.30x = 207,480.45 × 85,176.20
  4. Step 4: Simplify right side
    138,320.30x = 17,672,396,305.29
  5. Step 5: Solve for x
    x = 17,672,396,305.29/138,320.30
  6. Step 6: Final answer
    x = 127,764.30

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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.