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Finding the Fourth Proportional to 171.49, 257.25 and 48.11

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Solution

The fourth proportional to 171.49, 257.25 and 48.11 is: 72.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.49 : 257.25 = 48.11 : x
  2. Step 2: Convert to fraction form
    171.49/257.25 = 48.11/x
  3. Step 3: Cross multiply
    171.49x = 257.25 × 48.11
  4. Step 4: Simplify right side
    171.49x = 12,375.42
  5. Step 5: Solve for x
    x = 12,375.42/171.49
  6. Step 6: Final answer
    x = 72.16

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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.