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Finding the Fourth Proportional to 143.38, 197.77 and 104.50

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Solution

The fourth proportional to 143.38, 197.77 and 104.50 is: 144.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.38 : 197.77 = 104.50 : x
  2. Step 2: Convert to fraction form
    143.38/197.77 = 104.50/x
  3. Step 3: Cross multiply
    143.38x = 197.77 × 104.50
  4. Step 4: Simplify right side
    143.38x = 20,666.97
  5. Step 5: Solve for x
    x = 20,666.97/143.38
  6. Step 6: Final answer
    x = 144.14

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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.