Home / 126,006.45-189,009.68-81,391.65

Finding the Fourth Proportional to 126,006.45, 189,009.68 and 81,391.65

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Solution

The fourth proportional to 126,006.45, 189,009.68 and 81,391.65 is: 122,087.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,006.45 : 189,009.68 = 81,391.65 : x
  2. Step 2: Convert to fraction form
    126,006.45/189,009.68 = 81,391.65/x
  3. Step 3: Cross multiply
    126,006.45x = 189,009.68 × 81,391.65
  4. Step 4: Simplify right side
    126,006.45x = 15,383,809,466.82
  5. Step 5: Solve for x
    x = 15,383,809,466.82/126,006.45
  6. Step 6: Final answer
    x = 122,087.48

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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.