Home / 136,719.30-205,200.45-80,489.10

Finding the Fourth Proportional to 136,719.30, 205,200.45 and 80,489.10

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Solution

The fourth proportional to 136,719.30, 205,200.45 and 80,489.10 is: 120,805.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,719.30 : 205,200.45 = 80,489.10 : x
  2. Step 2: Convert to fraction form
    136,719.30/205,200.45 = 80,489.10/x
  3. Step 3: Cross multiply
    136,719.30x = 205,200.45 × 80,489.10
  4. Step 4: Simplify right side
    136,719.30x = 16,516,399,540.10
  5. Step 5: Solve for x
    x = 16,516,399,540.10/136,719.30
  6. Step 6: Final answer
    x = 120,805.18

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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.