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Finding the Fourth Proportional to 172.88, 238.68 and 107.44

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Solution

The fourth proportional to 172.88, 238.68 and 107.44 is: 148.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.88 : 238.68 = 107.44 : x
  2. Step 2: Convert to fraction form
    172.88/238.68 = 107.44/x
  3. Step 3: Cross multiply
    172.88x = 238.68 × 107.44
  4. Step 4: Simplify right side
    172.88x = 25,643.78
  5. Step 5: Solve for x
    x = 25,643.78/172.88
  6. Step 6: Final answer
    x = 148.33

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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.