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Finding the Fourth Proportional to 172.86, 238.55 and 95.23

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Solution

The fourth proportional to 172.86, 238.55 and 95.23 is: 131.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.86 : 238.55 = 95.23 : x
  2. Step 2: Convert to fraction form
    172.86/238.55 = 95.23/x
  3. Step 3: Cross multiply
    172.86x = 238.55 × 95.23
  4. Step 4: Simplify right side
    172.86x = 22,717.12
  5. Step 5: Solve for x
    x = 22,717.12/172.86
  6. Step 6: Final answer
    x = 131.42

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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.