Home / 129,767.20-194,650.80-80,615.20

Finding the Fourth Proportional to 129,767.20, 194,650.80 and 80,615.20

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Solution

The fourth proportional to 129,767.20, 194,650.80 and 80,615.20 is: 120,922.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,767.20 : 194,650.80 = 80,615.20 : x
  2. Step 2: Convert to fraction form
    129,767.20/194,650.80 = 80,615.20/x
  3. Step 3: Cross multiply
    129,767.20x = 194,650.80 × 80,615.20
  4. Step 4: Simplify right side
    129,767.20x = 15,691,813,172.16
  5. Step 5: Solve for x
    x = 15,691,813,172.16/129,767.20
  6. Step 6: Final answer
    x = 120,922.80

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1.5x scale

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.