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Finding the Fourth Proportional to 111,558.28, 166,919.16 and 66,414.51

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Solution

The fourth proportional to 111,558.28, 166,919.16 and 66,414.51 is: 99,372.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,558.28 : 166,919.16 = 66,414.51 : x
  2. Step 2: Convert to fraction form
    111,558.28/166,919.16 = 66,414.51/x
  3. Step 3: Cross multiply
    111,558.28x = 166,919.16 × 66,414.51
  4. Step 4: Simplify right side
    111,558.28x = 11,085,854,221.01
  5. Step 5: Solve for x
    x = 11,085,854,221.01/111,558.28
  6. Step 6: Final answer
    x = 99,372.76

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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.