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Finding the Fourth Proportional to 144.48, 216.87 and 137.31

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Solution

The fourth proportional to 144.48, 216.87 and 137.31 is: 206.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.48 : 216.87 = 137.31 : x
  2. Step 2: Convert to fraction form
    144.48/216.87 = 137.31/x
  3. Step 3: Cross multiply
    144.48x = 216.87 × 137.31
  4. Step 4: Simplify right side
    144.48x = 29,778.42
  5. Step 5: Solve for x
    x = 29,778.42/144.48
  6. Step 6: Final answer
    x = 206.11

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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.