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Finding the Fourth Proportional to 144.90, 199.72 and 108.05

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Solution

The fourth proportional to 144.90, 199.72 and 108.05 is: 148.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.90 : 199.72 = 108.05 : x
  2. Step 2: Convert to fraction form
    144.90/199.72 = 108.05/x
  3. Step 3: Cross multiply
    144.90x = 199.72 × 108.05
  4. Step 4: Simplify right side
    144.90x = 21,578.75
  5. Step 5: Solve for x
    x = 21,578.75/144.90
  6. Step 6: Final answer
    x = 148.92

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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.