Home / 126,003.12-189,004.68-86,440.32

Finding the Fourth Proportional to 126,003.12, 189,004.68 and 86,440.32

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Solution

The fourth proportional to 126,003.12, 189,004.68 and 86,440.32 is: 129,660.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,003.12 : 189,004.68 = 86,440.32 : x
  2. Step 2: Convert to fraction form
    126,003.12/189,004.68 = 86,440.32/x
  3. Step 3: Cross multiply
    126,003.12x = 189,004.68 × 86,440.32
  4. Step 4: Simplify right side
    126,003.12x = 16,337,625,020.70
  5. Step 5: Solve for x
    x = 16,337,625,020.70/126,003.12
  6. Step 6: Final answer
    x = 129,660.48

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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.