Home / 126,278.40-189,187.20-76,972.80

Finding the Fourth Proportional to 126,278.40, 189,187.20 and 76,972.80

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Solution

The fourth proportional to 126,278.40, 189,187.20 and 76,972.80 is: 115,318.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,278.40 : 189,187.20 = 76,972.80 : x
  2. Step 2: Convert to fraction form
    126,278.40/189,187.20 = 76,972.80/x
  3. Step 3: Cross multiply
    126,278.40x = 189,187.20 × 76,972.80
  4. Step 4: Simplify right side
    126,278.40x = 14,562,268,508.16
  5. Step 5: Solve for x
    x = 14,562,268,508.16/126,278.40
  6. Step 6: Final answer
    x = 115,318.76

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1.5x scale

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.