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Finding the Fourth Proportional to 144.33, 199.20 and 100.64

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Solution

The fourth proportional to 144.33, 199.20 and 100.64 is: 138.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.33 : 199.20 = 100.64 : x
  2. Step 2: Convert to fraction form
    144.33/199.20 = 100.64/x
  3. Step 3: Cross multiply
    144.33x = 199.20 × 100.64
  4. Step 4: Simplify right side
    144.33x = 20,048.36
  5. Step 5: Solve for x
    x = 20,048.36/144.33
  6. Step 6: Final answer
    x = 138.91

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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.