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Finding the Fourth Proportional to 171.01, 256.30 and 79.69

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Solution

The fourth proportional to 171.01, 256.30 and 79.69 is: 119.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.01 : 256.30 = 79.69 : x
  2. Step 2: Convert to fraction form
    171.01/256.30 = 79.69/x
  3. Step 3: Cross multiply
    171.01x = 256.30 × 79.69
  4. Step 4: Simplify right side
    171.01x = 20,424.55
  5. Step 5: Solve for x
    x = 20,424.55/171.01
  6. Step 6: Final answer
    x = 119.43

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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.