Home / 129,919.20-194,781.60-70,821.60

Finding the Fourth Proportional to 129,919.20, 194,781.60 and 70,821.60

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Solution

The fourth proportional to 129,919.20, 194,781.60 and 70,821.60 is: 106,179.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,919.20 : 194,781.60 = 70,821.60 : x
  2. Step 2: Convert to fraction form
    129,919.20/194,781.60 = 70,821.60/x
  3. Step 3: Cross multiply
    129,919.20x = 194,781.60 × 70,821.60
  4. Step 4: Simplify right side
    129,919.20x = 13,794,744,562.56
  5. Step 5: Solve for x
    x = 13,794,744,562.56/129,919.20
  6. Step 6: Final answer
    x = 106,179.41

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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.