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Finding the Fourth Proportional to 171, 256.56 and 102.56

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Solution

The fourth proportional to 171, 256.56 and 102.56 is: 153.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    171 : 256.56 = 102.56 : x
  2. Step 2: Convert to fraction form
    171/256.56 = 102.56/x
  3. Step 3: Cross multiply
    171x = 256.56 × 102.56
  4. Step 4: Simplify right side
    171x = 26,312.79
  5. Step 5: Solve for x
    x = 26,312.79/171
  6. Step 6: Final answer
    x = 153.88

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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.