Home / 126,311.28-189,411.80-67,132.72

Finding the Fourth Proportional to 126,311.28, 189,411.80 and 67,132.72

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Solution

The fourth proportional to 126,311.28, 189,411.80 and 67,132.72 is: 100,669.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,311.28 : 189,411.80 = 67,132.72 : x
  2. Step 2: Convert to fraction form
    126,311.28/189,411.80 = 67,132.72/x
  3. Step 3: Cross multiply
    126,311.28x = 189,411.80 × 67,132.72
  4. Step 4: Simplify right side
    126,311.28x = 12,715,729,334.10
  5. Step 5: Solve for x
    x = 12,715,729,334.10/126,311.28
  6. Step 6: Final answer
    x = 100,669.78

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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.