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Finding the Fourth Proportional to 81,138.89, 111,969.48 and 44,343.65

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Solution

The fourth proportional to 81,138.89, 111,969.48 and 44,343.65 is: 61,193.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,138.89 : 111,969.48 = 44,343.65 : x
  2. Step 2: Convert to fraction form
    81,138.89/111,969.48 = 44,343.65/x
  3. Step 3: Cross multiply
    81,138.89x = 111,969.48 × 44,343.65
  4. Step 4: Simplify right side
    81,138.89x = 4,965,135,431.80
  5. Step 5: Solve for x
    x = 4,965,135,431.80/81,138.89
  6. Step 6: Final answer
    x = 61,193.04

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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.