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Finding the Fourth Proportional to 144.39, 199.08 and 113.21

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Solution

The fourth proportional to 144.39, 199.08 and 113.21 is: 156.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.39 : 199.08 = 113.21 : x
  2. Step 2: Convert to fraction form
    144.39/199.08 = 113.21/x
  3. Step 3: Cross multiply
    144.39x = 199.08 × 113.21
  4. Step 4: Simplify right side
    144.39x = 22,536.85
  5. Step 5: Solve for x
    x = 22,536.85/144.39
  6. Step 6: Final answer
    x = 156.08

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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.