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Finding the Fourth Proportional to 144.94, 199.90 and 140.18

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Solution

The fourth proportional to 144.94, 199.90 and 140.18 is: 193.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.94 : 199.90 = 140.18 : x
  2. Step 2: Convert to fraction form
    144.94/199.90 = 140.18/x
  3. Step 3: Cross multiply
    144.94x = 199.90 × 140.18
  4. Step 4: Simplify right side
    144.94x = 28,021.98
  5. Step 5: Solve for x
    x = 28,021.98/144.94
  6. Step 6: Final answer
    x = 193.34

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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.