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Finding the Fourth Proportional to 170.21, 234.85 and 108.02

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Solution

The fourth proportional to 170.21, 234.85 and 108.02 is: 149.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.21 : 234.85 = 108.02 : x
  2. Step 2: Convert to fraction form
    170.21/234.85 = 108.02/x
  3. Step 3: Cross multiply
    170.21x = 234.85 × 108.02
  4. Step 4: Simplify right side
    170.21x = 25,367.05
  5. Step 5: Solve for x
    x = 25,367.05/170.21
  6. Step 6: Final answer
    x = 149.03

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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.