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Finding the Fourth Proportional to 144.99, 200.12 and 105.71

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Solution

The fourth proportional to 144.99, 200.12 and 105.71 is: 145.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.99 : 200.12 = 105.71 : x
  2. Step 2: Convert to fraction form
    144.99/200.12 = 105.71/x
  3. Step 3: Cross multiply
    144.99x = 200.12 × 105.71
  4. Step 4: Simplify right side
    144.99x = 21,153.75
  5. Step 5: Solve for x
    x = 21,153.75/144.99
  6. Step 6: Final answer
    x = 145.90

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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.