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Finding the Fourth Proportional to 171.01, 256.36 and 84.28

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Solution

The fourth proportional to 171.01, 256.36 and 84.28 is: 126.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.01 : 256.36 = 84.28 : x
  2. Step 2: Convert to fraction form
    171.01/256.36 = 84.28/x
  3. Step 3: Cross multiply
    171.01x = 256.36 × 84.28
  4. Step 4: Simplify right side
    171.01x = 21,606.02
  5. Step 5: Solve for x
    x = 21,606.02/171.01
  6. Step 6: Final answer
    x = 126.34

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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.