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Finding the Fourth Proportional to 166.95, 230.64 and 111.67

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Solution

The fourth proportional to 166.95, 230.64 and 111.67 is: 154.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.95 : 230.64 = 111.67 : x
  2. Step 2: Convert to fraction form
    166.95/230.64 = 111.67/x
  3. Step 3: Cross multiply
    166.95x = 230.64 × 111.67
  4. Step 4: Simplify right side
    166.95x = 25,755.57
  5. Step 5: Solve for x
    x = 25,755.57/166.95
  6. Step 6: Final answer
    x = 154.27

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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.