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Finding the Fourth Proportional to 166.35, 249.38 and 115.10

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Solution

The fourth proportional to 166.35, 249.38 and 115.10 is: 172.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.35 : 249.38 = 115.10 : x
  2. Step 2: Convert to fraction form
    166.35/249.38 = 115.10/x
  3. Step 3: Cross multiply
    166.35x = 249.38 × 115.10
  4. Step 4: Simplify right side
    166.35x = 28,703.64
  5. Step 5: Solve for x
    x = 28,703.64/166.35
  6. Step 6: Final answer
    x = 172.55

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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.