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Finding the Fourth Proportional to 128,105.91, 192,183.57 and 39,343.68

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Solution

The fourth proportional to 128,105.91, 192,183.57 and 39,343.68 is: 59,023.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,105.91 : 192,183.57 = 39,343.68 : x
  2. Step 2: Convert to fraction form
    128,105.91/192,183.57 = 39,343.68/x
  3. Step 3: Cross multiply
    128,105.91x = 192,183.57 × 39,343.68
  4. Step 4: Simplify right side
    128,105.91x = 7,561,208,879.34
  5. Step 5: Solve for x
    x = 7,561,208,879.34/128,105.91
  6. Step 6: Final answer
    x = 59,023.11

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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.