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Finding the Fourth Proportional to 171.39, 256.01 and 113.13

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Solution

The fourth proportional to 171.39, 256.01 and 113.13 is: 168.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.39 : 256.01 = 113.13 : x
  2. Step 2: Convert to fraction form
    171.39/256.01 = 113.13/x
  3. Step 3: Cross multiply
    171.39x = 256.01 × 113.13
  4. Step 4: Simplify right side
    171.39x = 28,962.69
  5. Step 5: Solve for x
    x = 28,962.69/171.39
  6. Step 6: Final answer
    x = 168.99

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.