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Finding the Fourth Proportional to 171.37, 236.15 and 122.16

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Solution

The fourth proportional to 171.37, 236.15 and 122.16 is: 168.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.37 : 236.15 = 122.16 : x
  2. Step 2: Convert to fraction form
    171.37/236.15 = 122.16/x
  3. Step 3: Cross multiply
    171.37x = 236.15 × 122.16
  4. Step 4: Simplify right side
    171.37x = 28,848.08
  5. Step 5: Solve for x
    x = 28,848.08/171.37
  6. Step 6: Final answer
    x = 168.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.