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Finding the Fourth Proportional to 171.68, 257.40 and 61.94

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Solution

The fourth proportional to 171.68, 257.40 and 61.94 is: 92.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.68 : 257.40 = 61.94 : x
  2. Step 2: Convert to fraction form
    171.68/257.40 = 61.94/x
  3. Step 3: Cross multiply
    171.68x = 257.40 × 61.94
  4. Step 4: Simplify right side
    171.68x = 15,944.00
  5. Step 5: Solve for x
    x = 15,944.00/171.68
  6. Step 6: Final answer
    x = 92.87

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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.