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Finding the Fourth Proportional to 166.12, 249.23 and 57.90

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Solution

The fourth proportional to 166.12, 249.23 and 57.90 is: 86.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.12 : 249.23 = 57.90 : x
  2. Step 2: Convert to fraction form
    166.12/249.23 = 57.90/x
  3. Step 3: Cross multiply
    166.12x = 249.23 × 57.90
  4. Step 4: Simplify right side
    166.12x = 14,430.42
  5. Step 5: Solve for x
    x = 14,430.42/166.12
  6. Step 6: Final answer
    x = 86.87

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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.