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Finding the Fourth Proportional to 144.93, 217.32 and 90.73

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Solution

The fourth proportional to 144.93, 217.32 and 90.73 is: 136.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.93 : 217.32 = 90.73 : x
  2. Step 2: Convert to fraction form
    144.93/217.32 = 90.73/x
  3. Step 3: Cross multiply
    144.93x = 217.32 × 90.73
  4. Step 4: Simplify right side
    144.93x = 19,717.44
  5. Step 5: Solve for x
    x = 19,717.44/144.93
  6. Step 6: Final answer
    x = 136.05

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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.