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Finding the Fourth Proportional to 111,974.86, 154,525.29 and 61,673.86

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Solution

The fourth proportional to 111,974.86, 154,525.29 and 61,673.86 is: 85,109.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,974.86 : 154,525.29 = 61,673.86 : x
  2. Step 2: Convert to fraction form
    111,974.86/154,525.29 = 61,673.86/x
  3. Step 3: Cross multiply
    111,974.86x = 154,525.29 × 61,673.86
  4. Step 4: Simplify right side
    111,974.86x = 9,530,170,329.29
  5. Step 5: Solve for x
    x = 9,530,170,329.29/111,974.86
  6. Step 6: Final answer
    x = 85,109.91

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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.