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Finding the Fourth Proportional to 114.12, 170.49 and 108.20

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Solution

The fourth proportional to 114.12, 170.49 and 108.20 is: 161.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.12 : 170.49 = 108.20 : x
  2. Step 2: Convert to fraction form
    114.12/170.49 = 108.20/x
  3. Step 3: Cross multiply
    114.12x = 170.49 × 108.20
  4. Step 4: Simplify right side
    114.12x = 18,447.02
  5. Step 5: Solve for x
    x = 18,447.02/114.12
  6. Step 6: Final answer
    x = 161.65

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.