Home / 128,721.28-193,081.92-84,627.04

Finding the Fourth Proportional to 128,721.28, 193,081.92 and 84,627.04

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Solution

The fourth proportional to 128,721.28, 193,081.92 and 84,627.04 is: 126,940.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,721.28 : 193,081.92 = 84,627.04 : x
  2. Step 2: Convert to fraction form
    128,721.28/193,081.92 = 84,627.04/x
  3. Step 3: Cross multiply
    128,721.28x = 193,081.92 × 84,627.04
  4. Step 4: Simplify right side
    128,721.28x = 16,339,951,367.12
  5. Step 5: Solve for x
    x = 16,339,951,367.12/128,721.28
  6. Step 6: Final answer
    x = 126,940.56

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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.