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Finding the Fourth Proportional to 149.11, 223.67 and 57.85

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Solution

The fourth proportional to 149.11, 223.67 and 57.85 is: 86.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.11 : 223.67 = 57.85 : x
  2. Step 2: Convert to fraction form
    149.11/223.67 = 57.85/x
  3. Step 3: Cross multiply
    149.11x = 223.67 × 57.85
  4. Step 4: Simplify right side
    149.11x = 12,939.31
  5. Step 5: Solve for x
    x = 12,939.31/149.11
  6. Step 6: Final answer
    x = 86.78

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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.