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Finding the Fourth Proportional to 144.71, 199.71 and 109.65

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Solution

The fourth proportional to 144.71, 199.71 and 109.65 is: 151.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.71 : 199.71 = 109.65 : x
  2. Step 2: Convert to fraction form
    144.71/199.71 = 109.65/x
  3. Step 3: Cross multiply
    144.71x = 199.71 × 109.65
  4. Step 4: Simplify right side
    144.71x = 21,898.20
  5. Step 5: Solve for x
    x = 21,898.20/144.71
  6. Step 6: Final answer
    x = 151.33

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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.