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Finding the Fourth Proportional to 111,957.75, 167,542.20 and 69,857.65

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Solution

The fourth proportional to 111,957.75, 167,542.20 and 69,857.65 is: 104,540.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,957.75 : 167,542.20 = 69,857.65 : x
  2. Step 2: Convert to fraction form
    111,957.75/167,542.20 = 69,857.65/x
  3. Step 3: Cross multiply
    111,957.75x = 167,542.20 × 69,857.65
  4. Step 4: Simplify right side
    111,957.75x = 11,704,104,367.83
  5. Step 5: Solve for x
    x = 11,704,104,367.83/111,957.75
  6. Step 6: Final answer
    x = 104,540.37

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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.