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Finding the Fourth Proportional to 144.25, 197.46 and 139.59

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Solution

The fourth proportional to 144.25, 197.46 and 139.59 is: 191.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.25 : 197.46 = 139.59 : x
  2. Step 2: Convert to fraction form
    144.25/197.46 = 139.59/x
  3. Step 3: Cross multiply
    144.25x = 197.46 × 139.59
  4. Step 4: Simplify right side
    144.25x = 27,563.44
  5. Step 5: Solve for x
    x = 27,563.44/144.25
  6. Step 6: Final answer
    x = 191.08

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.