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Finding the Fourth Proportional to 170.67, 235.30 and 111.54

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Solution

The fourth proportional to 170.67, 235.30 and 111.54 is: 153.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.67 : 235.30 = 111.54 : x
  2. Step 2: Convert to fraction form
    170.67/235.30 = 111.54/x
  3. Step 3: Cross multiply
    170.67x = 235.30 × 111.54
  4. Step 4: Simplify right side
    170.67x = 26,244.80
  5. Step 5: Solve for x
    x = 26,244.80/170.67
  6. Step 6: Final answer
    x = 153.78

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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.