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Finding the Fourth Proportional to 173.17, 238.78 and 123.96

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Solution

The fourth proportional to 173.17, 238.78 and 123.96 is: 170.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.17 : 238.78 = 123.96 : x
  2. Step 2: Convert to fraction form
    173.17/238.78 = 123.96/x
  3. Step 3: Cross multiply
    173.17x = 238.78 × 123.96
  4. Step 4: Simplify right side
    173.17x = 29,600.22
  5. Step 5: Solve for x
    x = 29,600.22/173.17
  6. Step 6: Final answer
    x = 170.93

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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.