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Finding the Fourth Proportional to 166.78, 230.34 and 117.10

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Solution

The fourth proportional to 166.78, 230.34 and 117.10 is: 161.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.78 : 230.34 = 117.10 : x
  2. Step 2: Convert to fraction form
    166.78/230.34 = 117.10/x
  3. Step 3: Cross multiply
    166.78x = 230.34 × 117.10
  4. Step 4: Simplify right side
    166.78x = 26,972.81
  5. Step 5: Solve for x
    x = 26,972.81/166.78
  6. Step 6: Final answer
    x = 161.73

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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.