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Finding the Fourth Proportional to 111,991.05, 154,536.44 and 68,963.65

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Solution

The fourth proportional to 111,991.05, 154,536.44 and 68,963.65 is: 95,162.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,991.05 : 154,536.44 = 68,963.65 : x
  2. Step 2: Convert to fraction form
    111,991.05/154,536.44 = 68,963.65/x
  3. Step 3: Cross multiply
    111,991.05x = 154,536.44 × 68,963.65
  4. Step 4: Simplify right side
    111,991.05x = 10,657,396,229.25
  5. Step 5: Solve for x
    x = 10,657,396,229.25/111,991.05
  6. Step 6: Final answer
    x = 95,162.93

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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.