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Finding the Fourth Proportional to 144.12, 199.08 and 105.51

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Solution

The fourth proportional to 144.12, 199.08 and 105.51 is: 145.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.12 : 199.08 = 105.51 : x
  2. Step 2: Convert to fraction form
    144.12/199.08 = 105.51/x
  3. Step 3: Cross multiply
    144.12x = 199.08 × 105.51
  4. Step 4: Simplify right side
    144.12x = 21,004.93
  5. Step 5: Solve for x
    x = 21,004.93/144.12
  6. Step 6: Final answer
    x = 145.75

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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.