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Finding the Fourth Proportional to 172.67, 238.31 and 110.45

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Solution

The fourth proportional to 172.67, 238.31 and 110.45 is: 152.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.67 : 238.31 = 110.45 : x
  2. Step 2: Convert to fraction form
    172.67/238.31 = 110.45/x
  3. Step 3: Cross multiply
    172.67x = 238.31 × 110.45
  4. Step 4: Simplify right side
    172.67x = 26,319.60
  5. Step 5: Solve for x
    x = 26,319.60/172.67
  6. Step 6: Final answer
    x = 152.43

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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.