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Finding the Fourth Proportional to 170.22, 234.86 and 131.42

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Solution

The fourth proportional to 170.22, 234.86 and 131.42 is: 181.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.22 : 234.86 = 131.42 : x
  2. Step 2: Convert to fraction form
    170.22/234.86 = 131.42/x
  3. Step 3: Cross multiply
    170.22x = 234.86 × 131.42
  4. Step 4: Simplify right side
    170.22x = 30,865.30
  5. Step 5: Solve for x
    x = 30,865.30/170.22
  6. Step 6: Final answer
    x = 181.33

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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.