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Finding the Fourth Proportional to 172.87, 238.34 and 168.08

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Solution

The fourth proportional to 172.87, 238.34 and 168.08 is: 231.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.87 : 238.34 = 168.08 : x
  2. Step 2: Convert to fraction form
    172.87/238.34 = 168.08/x
  3. Step 3: Cross multiply
    172.87x = 238.34 × 168.08
  4. Step 4: Simplify right side
    172.87x = 40,059.42
  5. Step 5: Solve for x
    x = 40,059.42/172.87
  6. Step 6: Final answer
    x = 231.73

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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.