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Finding the Fourth Proportional to 144.04, 198.72 and 100.36

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Solution

The fourth proportional to 144.04, 198.72 and 100.36 is: 138.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.04 : 198.72 = 100.36 : x
  2. Step 2: Convert to fraction form
    144.04/198.72 = 100.36/x
  3. Step 3: Cross multiply
    144.04x = 198.72 × 100.36
  4. Step 4: Simplify right side
    144.04x = 19,943.54
  5. Step 5: Solve for x
    x = 19,943.54/144.04
  6. Step 6: Final answer
    x = 138.46

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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.