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Finding the Fourth Proportional to 172.68, 239.24 and 170.68

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Solution

The fourth proportional to 172.68, 239.24 and 170.68 is: 236.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.68 : 239.24 = 170.68 : x
  2. Step 2: Convert to fraction form
    172.68/239.24 = 170.68/x
  3. Step 3: Cross multiply
    172.68x = 239.24 × 170.68
  4. Step 4: Simplify right side
    172.68x = 40,833.48
  5. Step 5: Solve for x
    x = 40,833.48/172.68
  6. Step 6: Final answer
    x = 236.47

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.