Home / 126,108.62-188,829.20-76,121.90

Finding the Fourth Proportional to 126,108.62, 188,829.20 and 76,121.90

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Solution

The fourth proportional to 126,108.62, 188,829.20 and 76,121.90 is: 113,981.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,108.62 : 188,829.20 = 76,121.90 : x
  2. Step 2: Convert to fraction form
    126,108.62/188,829.20 = 76,121.90/x
  3. Step 3: Cross multiply
    126,108.62x = 188,829.20 × 76,121.90
  4. Step 4: Simplify right side
    126,108.62x = 14,374,037,479.48
  5. Step 5: Solve for x
    x = 14,374,037,479.48/126,108.62
  6. Step 6: Final answer
    x = 113,981.40

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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.