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Finding the Fourth Proportional to 171.89, 257.12 and 130.44

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Solution

The fourth proportional to 171.89, 257.12 and 130.44 is: 195.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.89 : 257.12 = 130.44 : x
  2. Step 2: Convert to fraction form
    171.89/257.12 = 130.44/x
  3. Step 3: Cross multiply
    171.89x = 257.12 × 130.44
  4. Step 4: Simplify right side
    171.89x = 33,538.08
  5. Step 5: Solve for x
    x = 33,538.08/171.89
  6. Step 6: Final answer
    x = 195.12

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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.