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Finding the Fourth Proportional to 144.32, 199.55 and 137.75

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Solution

The fourth proportional to 144.32, 199.55 and 137.75 is: 190.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.32 : 199.55 = 137.75 : x
  2. Step 2: Convert to fraction form
    144.32/199.55 = 137.75/x
  3. Step 3: Cross multiply
    144.32x = 199.55 × 137.75
  4. Step 4: Simplify right side
    144.32x = 27,488.01
  5. Step 5: Solve for x
    x = 27,488.01/144.32
  6. Step 6: Final answer
    x = 190.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.