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Finding the Fourth Proportional to 171.63, 257.61 and 125.85

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Solution

The fourth proportional to 171.63, 257.61 and 125.85 is: 188.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.63 : 257.61 = 125.85 : x
  2. Step 2: Convert to fraction form
    171.63/257.61 = 125.85/x
  3. Step 3: Cross multiply
    171.63x = 257.61 × 125.85
  4. Step 4: Simplify right side
    171.63x = 32,420.21
  5. Step 5: Solve for x
    x = 32,420.21/171.63
  6. Step 6: Final answer
    x = 188.90

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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.