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Finding the Fourth Proportional to 144.05, 198.61 and 104.77

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Solution

The fourth proportional to 144.05, 198.61 and 104.77 is: 144.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.05 : 198.61 = 104.77 : x
  2. Step 2: Convert to fraction form
    144.05/198.61 = 104.77/x
  3. Step 3: Cross multiply
    144.05x = 198.61 × 104.77
  4. Step 4: Simplify right side
    144.05x = 20,807.61
  5. Step 5: Solve for x
    x = 20,807.61/144.05
  6. Step 6: Final answer
    x = 144.44

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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.