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Finding the Fourth Proportional to 171.34, 256.70 and 102.89

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Solution

The fourth proportional to 171.34, 256.70 and 102.89 is: 154.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.34 : 256.70 = 102.89 : x
  2. Step 2: Convert to fraction form
    171.34/256.70 = 102.89/x
  3. Step 3: Cross multiply
    171.34x = 256.70 × 102.89
  4. Step 4: Simplify right side
    171.34x = 26,412.76
  5. Step 5: Solve for x
    x = 26,412.76/171.34
  6. Step 6: Final answer
    x = 154.16

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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.