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Finding the Fourth Proportional to 144.88, 199.06 and 138.52

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Solution

The fourth proportional to 144.88, 199.06 and 138.52 is: 190.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.88 : 199.06 = 138.52 : x
  2. Step 2: Convert to fraction form
    144.88/199.06 = 138.52/x
  3. Step 3: Cross multiply
    144.88x = 199.06 × 138.52
  4. Step 4: Simplify right side
    144.88x = 27,573.79
  5. Step 5: Solve for x
    x = 27,573.79/144.88
  6. Step 6: Final answer
    x = 190.32

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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.