Home / 128,768.28-193,164.96-39,997.92

Finding the Fourth Proportional to 128,768.28, 193,164.96 and 39,997.92

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Solution

The fourth proportional to 128,768.28, 193,164.96 and 39,997.92 is: 60,000.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,768.28 : 193,164.96 = 39,997.92 : x
  2. Step 2: Convert to fraction form
    128,768.28/193,164.96 = 39,997.92/x
  3. Step 3: Cross multiply
    128,768.28x = 193,164.96 × 39,997.92
  4. Step 4: Simplify right side
    128,768.28x = 7,726,196,616.88
  5. Step 5: Solve for x
    x = 7,726,196,616.88/128,768.28
  6. Step 6: Final answer
    x = 60,000.78

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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.