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Finding the Fourth Proportional to 237.12, 327.23 and 138.87

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Solution

The fourth proportional to 237.12, 327.23 and 138.87 is: 191.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    237.12 : 327.23 = 138.87 : x
  2. Step 2: Convert to fraction form
    237.12/327.23 = 138.87/x
  3. Step 3: Cross multiply
    237.12x = 327.23 × 138.87
  4. Step 4: Simplify right side
    237.12x = 45,442.43
  5. Step 5: Solve for x
    x = 45,442.43/237.12
  6. Step 6: Final answer
    x = 191.64

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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.