Home / 128,231.28-192,369.06-57,179.16

Finding the Fourth Proportional to 128,231.28, 192,369.06 and 57,179.16

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Solution

The fourth proportional to 128,231.28, 192,369.06 and 57,179.16 is: 85,778.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,231.28 : 192,369.06 = 57,179.16 : x
  2. Step 2: Convert to fraction form
    128,231.28/192,369.06 = 57,179.16/x
  3. Step 3: Cross multiply
    128,231.28x = 192,369.06 × 57,179.16
  4. Step 4: Simplify right side
    128,231.28x = 10,999,501,260.79
  5. Step 5: Solve for x
    x = 10,999,501,260.79/128,231.28
  6. Step 6: Final answer
    x = 85,778.61

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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.