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Finding the Fourth Proportional to 172.56, 238.15 and 94.94

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Solution

The fourth proportional to 172.56, 238.15 and 94.94 is: 131.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.56 : 238.15 = 94.94 : x
  2. Step 2: Convert to fraction form
    172.56/238.15 = 94.94/x
  3. Step 3: Cross multiply
    172.56x = 238.15 × 94.94
  4. Step 4: Simplify right side
    172.56x = 22,609.96
  5. Step 5: Solve for x
    x = 22,609.96/172.56
  6. Step 6: Final answer
    x = 131.03

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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.