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Finding the Fourth Proportional to 140.76, 211.32 and 108.84

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Solution

The fourth proportional to 140.76, 211.32 and 108.84 is: 163.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.76 : 211.32 = 108.84 : x
  2. Step 2: Convert to fraction form
    140.76/211.32 = 108.84/x
  3. Step 3: Cross multiply
    140.76x = 211.32 × 108.84
  4. Step 4: Simplify right side
    140.76x = 23,000.07
  5. Step 5: Solve for x
    x = 23,000.07/140.76
  6. Step 6: Final answer
    x = 163.40

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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.