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Finding the Fourth Proportional to 171.60, 257.94 and 131.10

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Solution

The fourth proportional to 171.60, 257.94 and 131.10 is: 197.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.60 : 257.94 = 131.10 : x
  2. Step 2: Convert to fraction form
    171.60/257.94 = 131.10/x
  3. Step 3: Cross multiply
    171.60x = 257.94 × 131.10
  4. Step 4: Simplify right side
    171.60x = 33,815.93
  5. Step 5: Solve for x
    x = 33,815.93/171.60
  6. Step 6: Final answer
    x = 197.06

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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.