Home / 129,906.20-194,859.30-66,920.60

Finding the Fourth Proportional to 129,906.20, 194,859.30 and 66,920.60

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Solution

The fourth proportional to 129,906.20, 194,859.30 and 66,920.60 is: 100,380.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,906.20 : 194,859.30 = 66,920.60 : x
  2. Step 2: Convert to fraction form
    129,906.20/194,859.30 = 66,920.60/x
  3. Step 3: Cross multiply
    129,906.20x = 194,859.30 × 66,920.60
  4. Step 4: Simplify right side
    129,906.20x = 13,040,101,271.58
  5. Step 5: Solve for x
    x = 13,040,101,271.58/129,906.20
  6. Step 6: Final answer
    x = 100,380.90

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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.