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Finding the Fourth Proportional to 144.56, 199.18 and 107.70

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Solution

The fourth proportional to 144.56, 199.18 and 107.70 is: 148.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.56 : 199.18 = 107.70 : x
  2. Step 2: Convert to fraction form
    144.56/199.18 = 107.70/x
  3. Step 3: Cross multiply
    144.56x = 199.18 × 107.70
  4. Step 4: Simplify right side
    144.56x = 21,451.69
  5. Step 5: Solve for x
    x = 21,451.69/144.56
  6. Step 6: Final answer
    x = 148.39

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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.