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Finding the Fourth Proportional to 168.81, 233.10 and 106.75

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Solution

The fourth proportional to 168.81, 233.10 and 106.75 is: 147.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.81 : 233.10 = 106.75 : x
  2. Step 2: Convert to fraction form
    168.81/233.10 = 106.75/x
  3. Step 3: Cross multiply
    168.81x = 233.10 × 106.75
  4. Step 4: Simplify right side
    168.81x = 24,883.43
  5. Step 5: Solve for x
    x = 24,883.43/168.81
  6. Step 6: Final answer
    x = 147.40

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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.