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Finding the Fourth Proportional to 140.78, 211.16 and 63.83

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Solution

The fourth proportional to 140.78, 211.16 and 63.83 is: 95.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.78 : 211.16 = 63.83 : x
  2. Step 2: Convert to fraction form
    140.78/211.16 = 63.83/x
  3. Step 3: Cross multiply
    140.78x = 211.16 × 63.83
  4. Step 4: Simplify right side
    140.78x = 13,476.97
  5. Step 5: Solve for x
    x = 13,476.97/140.78
  6. Step 6: Final answer
    x = 95.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.