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Finding the Fourth Proportional to 136,679.20, 204,945.90 and 57,704.20

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Solution

The fourth proportional to 136,679.20, 204,945.90 and 57,704.20 is: 86,525.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,679.20 : 204,945.90 = 57,704.20 : x
  2. Step 2: Convert to fraction form
    136,679.20/204,945.90 = 57,704.20/x
  3. Step 3: Cross multiply
    136,679.20x = 204,945.90 × 57,704.20
  4. Step 4: Simplify right side
    136,679.20x = 11,826,239,202.78
  5. Step 5: Solve for x
    x = 11,826,239,202.78/136,679.20
  6. Step 6: Final answer
    x = 86,525.52

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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.