Home / 129,964.20-194,946.30-80,812.20

Finding the Fourth Proportional to 129,964.20, 194,946.30 and 80,812.20

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Solution

The fourth proportional to 129,964.20, 194,946.30 and 80,812.20 is: 121,218.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,964.20 : 194,946.30 = 80,812.20 : x
  2. Step 2: Convert to fraction form
    129,964.20/194,946.30 = 80,812.20/x
  3. Step 3: Cross multiply
    129,964.20x = 194,946.30 × 80,812.20
  4. Step 4: Simplify right side
    129,964.20x = 15,754,039,384.86
  5. Step 5: Solve for x
    x = 15,754,039,384.86/129,964.20
  6. Step 6: Final answer
    x = 121,218.30

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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.