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Finding the Fourth Proportional to 172.76, 238.50 and 126.24

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Solution

The fourth proportional to 172.76, 238.50 and 126.24 is: 174.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.76 : 238.50 = 126.24 : x
  2. Step 2: Convert to fraction form
    172.76/238.50 = 126.24/x
  3. Step 3: Cross multiply
    172.76x = 238.50 × 126.24
  4. Step 4: Simplify right side
    172.76x = 30,108.24
  5. Step 5: Solve for x
    x = 30,108.24/172.76
  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.