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Finding the Fourth Proportional to 114.80, 172.20 and 107.97

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Solution

The fourth proportional to 114.80, 172.20 and 107.97 is: 161.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.80 : 172.20 = 107.97 : x
  2. Step 2: Convert to fraction form
    114.80/172.20 = 107.97/x
  3. Step 3: Cross multiply
    114.80x = 172.20 × 107.97
  4. Step 4: Simplify right side
    114.80x = 18,592.43
  5. Step 5: Solve for x
    x = 18,592.43/114.80
  6. Step 6: Final answer
    x = 161.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.