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Finding the Fourth Proportional to 114.12, 170.21 and 106.92

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Solution

The fourth proportional to 114.12, 170.21 and 106.92 is: 159.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.12 : 170.21 = 106.92 : x
  2. Step 2: Convert to fraction form
    114.12/170.21 = 106.92/x
  3. Step 3: Cross multiply
    114.12x = 170.21 × 106.92
  4. Step 4: Simplify right side
    114.12x = 18,198.85
  5. Step 5: Solve for x
    x = 18,198.85/114.12
  6. Step 6: Final answer
    x = 159.47

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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.