Home / 126,138.71-188,993.96-76,113.70

Finding the Fourth Proportional to 126,138.71, 188,993.96 and 76,113.70

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Solution

The fourth proportional to 126,138.71, 188,993.96 and 76,113.70 is: 114,041.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,138.71 : 188,993.96 = 76,113.70 : x
  2. Step 2: Convert to fraction form
    126,138.71/188,993.96 = 76,113.70/x
  3. Step 3: Cross multiply
    126,138.71x = 188,993.96 × 76,113.70
  4. Step 4: Simplify right side
    126,138.71x = 14,385,028,720.20
  5. Step 5: Solve for x
    x = 14,385,028,720.20/126,138.71
  6. Step 6: Final answer
    x = 114,041.35

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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.