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Finding the Fourth Proportional to 144.63, 199.53 and 105.75

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Solution

The fourth proportional to 144.63, 199.53 and 105.75 is: 145.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.63 : 199.53 = 105.75 : x
  2. Step 2: Convert to fraction form
    144.63/199.53 = 105.75/x
  3. Step 3: Cross multiply
    144.63x = 199.53 × 105.75
  4. Step 4: Simplify right side
    144.63x = 21,100.30
  5. Step 5: Solve for x
    x = 21,100.30/144.63
  6. Step 6: Final answer
    x = 145.89

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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.