Home / 129,780.20-194,670.30-80,628.20

Finding the Fourth Proportional to 129,780.20, 194,670.30 and 80,628.20

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Solution

The fourth proportional to 129,780.20, 194,670.30 and 80,628.20 is: 120,942.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,780.20 : 194,670.30 = 80,628.20 : x
  2. Step 2: Convert to fraction form
    129,780.20/194,670.30 = 80,628.20/x
  3. Step 3: Cross multiply
    129,780.20x = 194,670.30 × 80,628.20
  4. Step 4: Simplify right side
    129,780.20x = 15,695,915,882.46
  5. Step 5: Solve for x
    x = 15,695,915,882.46/129,780.20
  6. Step 6: Final answer
    x = 120,942.30

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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.