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Finding the Fourth Proportional to 144.21, 199.13 and 115.23

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Solution

The fourth proportional to 144.21, 199.13 and 115.23 is: 159.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.21 : 199.13 = 115.23 : x
  2. Step 2: Convert to fraction form
    144.21/199.13 = 115.23/x
  3. Step 3: Cross multiply
    144.21x = 199.13 × 115.23
  4. Step 4: Simplify right side
    144.21x = 22,945.17
  5. Step 5: Solve for x
    x = 22,945.17/144.21
  6. Step 6: Final answer
    x = 159.11

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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.