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Finding the Fourth Proportional to 144.12, 217.25 and 134.72

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Solution

The fourth proportional to 144.12, 217.25 and 134.72 is: 203.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.12 : 217.25 = 134.72 : x
  2. Step 2: Convert to fraction form
    144.12/217.25 = 134.72/x
  3. Step 3: Cross multiply
    144.12x = 217.25 × 134.72
  4. Step 4: Simplify right side
    144.12x = 29,267.92
  5. Step 5: Solve for x
    x = 29,267.92/144.12
  6. Step 6: Final answer
    x = 203.08

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.