Home / 129,820.20-194,730.30-81,147.30

Finding the Fourth Proportional to 129,820.20, 194,730.30 and 81,147.30

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Solution

The fourth proportional to 129,820.20, 194,730.30 and 81,147.30 is: 121,720.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,820.20 : 194,730.30 = 81,147.30 : x
  2. Step 2: Convert to fraction form
    129,820.20/194,730.30 = 81,147.30/x
  3. Step 3: Cross multiply
    129,820.20x = 194,730.30 × 81,147.30
  4. Step 4: Simplify right side
    129,820.20x = 15,801,838,073.19
  5. Step 5: Solve for x
    x = 15,801,838,073.19/129,820.20
  6. Step 6: Final answer
    x = 121,720.95

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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.