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Finding the Fourth Proportional to 166.81, 230.15 and 115.09

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Solution

The fourth proportional to 166.81, 230.15 and 115.09 is: 158.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.81 : 230.15 = 115.09 : x
  2. Step 2: Convert to fraction form
    166.81/230.15 = 115.09/x
  3. Step 3: Cross multiply
    166.81x = 230.15 × 115.09
  4. Step 4: Simplify right side
    166.81x = 26,487.39
  5. Step 5: Solve for x
    x = 26,487.39/166.81
  6. Step 6: Final answer
    x = 158.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.