Home / 126,048.75-189,073.12-86,485.92

Finding the Fourth Proportional to 126,048.75, 189,073.12 and 86,485.92

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Solution

The fourth proportional to 126,048.75, 189,073.12 and 86,485.92 is: 129,728.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,048.75 : 189,073.12 = 86,485.92 : x
  2. Step 2: Convert to fraction form
    126,048.75/189,073.12 = 86,485.92/x
  3. Step 3: Cross multiply
    126,048.75x = 189,073.12 × 86,485.92
  4. Step 4: Simplify right side
    126,048.75x = 16,352,162,730.47
  5. Step 5: Solve for x
    x = 16,352,162,730.47/126,048.75
  6. Step 6: Final answer
    x = 129,728.88

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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.