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Finding the Fourth Proportional to 128,394.44, 177,183.29 and 71,805.81

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Solution

The fourth proportional to 128,394.44, 177,183.29 and 71,805.81 is: 99,091.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,394.44 : 177,183.29 = 71,805.81 : x
  2. Step 2: Convert to fraction form
    128,394.44/177,183.29 = 71,805.81/x
  3. Step 3: Cross multiply
    128,394.44x = 177,183.29 × 71,805.81
  4. Step 4: Simplify right side
    128,394.44x = 12,722,789,297.89
  5. Step 5: Solve for x
    x = 12,722,789,297.89/128,394.44
  6. Step 6: Final answer
    x = 99,091.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.