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Finding the Fourth Proportional to 171.83, 237.23 and 122.21

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Solution

The fourth proportional to 171.83, 237.23 and 122.21 is: 168.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.83 : 237.23 = 122.21 : x
  2. Step 2: Convert to fraction form
    171.83/237.23 = 122.21/x
  3. Step 3: Cross multiply
    171.83x = 237.23 × 122.21
  4. Step 4: Simplify right side
    171.83x = 28,990.08
  5. Step 5: Solve for x
    x = 28,990.08/171.83
  6. Step 6: Final answer
    x = 168.72

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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.