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Finding the Fourth Proportional to 144.86, 200.79 and 139.82

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Solution

The fourth proportional to 144.86, 200.79 and 139.82 is: 193.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.86 : 200.79 = 139.82 : x
  2. Step 2: Convert to fraction form
    144.86/200.79 = 139.82/x
  3. Step 3: Cross multiply
    144.86x = 200.79 × 139.82
  4. Step 4: Simplify right side
    144.86x = 28,073.45
  5. Step 5: Solve for x
    x = 28,073.45/144.86
  6. Step 6: Final answer
    x = 193.80

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.