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Finding the Fourth Proportional to 166.36, 229.68 and 111.20

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Solution

The fourth proportional to 166.36, 229.68 and 111.20 is: 153.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.36 : 229.68 = 111.20 : x
  2. Step 2: Convert to fraction form
    166.36/229.68 = 111.20/x
  3. Step 3: Cross multiply
    166.36x = 229.68 × 111.20
  4. Step 4: Simplify right side
    166.36x = 25,540.42
  5. Step 5: Solve for x
    x = 25,540.42/166.36
  6. Step 6: Final answer
    x = 153.52

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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.