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Finding the Fourth Proportional to 140.91, 211.15 and 97.68

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Solution

The fourth proportional to 140.91, 211.15 and 97.68 is: 146.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.91 : 211.15 = 97.68 : x
  2. Step 2: Convert to fraction form
    140.91/211.15 = 97.68/x
  3. Step 3: Cross multiply
    140.91x = 211.15 × 97.68
  4. Step 4: Simplify right side
    140.91x = 20,625.13
  5. Step 5: Solve for x
    x = 20,625.13/140.91
  6. Step 6: Final answer
    x = 146.37

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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.