Home / 126,891.62-190,129.78-76,819.95

Finding the Fourth Proportional to 126,891.62, 190,129.78 and 76,819.95

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Solution

The fourth proportional to 126,891.62, 190,129.78 and 76,819.95 is: 115,104.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,891.62 : 190,129.78 = 76,819.95 : x
  2. Step 2: Convert to fraction form
    126,891.62/190,129.78 = 76,819.95/x
  3. Step 3: Cross multiply
    126,891.62x = 190,129.78 × 76,819.95
  4. Step 4: Simplify right side
    126,891.62x = 14,605,760,193.11
  5. Step 5: Solve for x
    x = 14,605,760,193.11/126,891.62
  6. Step 6: Final answer
    x = 115,104.21

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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.