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Finding the Fourth Proportional to 168.21, 232.04 and 109.21

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Solution

The fourth proportional to 168.21, 232.04 and 109.21 is: 150.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.21 : 232.04 = 109.21 : x
  2. Step 2: Convert to fraction form
    168.21/232.04 = 109.21/x
  3. Step 3: Cross multiply
    168.21x = 232.04 × 109.21
  4. Step 4: Simplify right side
    168.21x = 25,341.09
  5. Step 5: Solve for x
    x = 25,341.09/168.21
  6. Step 6: Final answer
    x = 150.65

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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.