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Finding the Fourth Proportional to 172.75, 238.53 and 126.22

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Solution

The fourth proportional to 172.75, 238.53 and 126.22 is: 174.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.75 : 238.53 = 126.22 : x
  2. Step 2: Convert to fraction form
    172.75/238.53 = 126.22/x
  3. Step 3: Cross multiply
    172.75x = 238.53 × 126.22
  4. Step 4: Simplify right side
    172.75x = 30,107.26
  5. Step 5: Solve for x
    x = 30,107.26/172.75
  6. Step 6: Final answer
    x = 174.28

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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.