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Finding the Fourth Proportional to 144.25, 215.32 and 126.95

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Solution

The fourth proportional to 144.25, 215.32 and 126.95 is: 189.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.25 : 215.32 = 126.95 : x
  2. Step 2: Convert to fraction form
    144.25/215.32 = 126.95/x
  3. Step 3: Cross multiply
    144.25x = 215.32 × 126.95
  4. Step 4: Simplify right side
    144.25x = 27,333.16
  5. Step 5: Solve for x
    x = 27,333.16/144.25
  6. Step 6: Final answer
    x = 189.49

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.