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Finding the Fourth Proportional to 144.02, 198.74 and 107.34

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Solution

The fourth proportional to 144.02, 198.74 and 107.34 is: 148.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.02 : 198.74 = 107.34 : x
  2. Step 2: Convert to fraction form
    144.02/198.74 = 107.34/x
  3. Step 3: Cross multiply
    144.02x = 198.74 × 107.34
  4. Step 4: Simplify right side
    144.02x = 21,332.75
  5. Step 5: Solve for x
    x = 21,332.75/144.02
  6. Step 6: Final answer
    x = 148.12

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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.