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Finding the Fourth Proportional to 172.92, 259.79 and 159.56

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Solution

The fourth proportional to 172.92, 259.79 and 159.56 is: 239.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.92 : 259.79 = 159.56 : x
  2. Step 2: Convert to fraction form
    172.92/259.79 = 159.56/x
  3. Step 3: Cross multiply
    172.92x = 259.79 × 159.56
  4. Step 4: Simplify right side
    172.92x = 41,452.09
  5. Step 5: Solve for x
    x = 41,452.09/172.92
  6. Step 6: Final answer
    x = 239.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.