Home / 129,638.20-194,457.30-80,965.30

Finding the Fourth Proportional to 129,638.20, 194,457.30 and 80,965.30

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Solution

The fourth proportional to 129,638.20, 194,457.30 and 80,965.30 is: 121,447.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,638.20 : 194,457.30 = 80,965.30 : x
  2. Step 2: Convert to fraction form
    129,638.20/194,457.30 = 80,965.30/x
  3. Step 3: Cross multiply
    129,638.20x = 194,457.30 × 80,965.30
  4. Step 4: Simplify right side
    129,638.20x = 15,744,293,631.69
  5. Step 5: Solve for x
    x = 15,744,293,631.69/129,638.20
  6. Step 6: Final answer
    x = 121,447.95

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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.