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Finding the Fourth Proportional to 137.85, 206.68 and 110.79

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Solution

The fourth proportional to 137.85, 206.68 and 110.79 is: 166.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.85 : 206.68 = 110.79 : x
  2. Step 2: Convert to fraction form
    137.85/206.68 = 110.79/x
  3. Step 3: Cross multiply
    137.85x = 206.68 × 110.79
  4. Step 4: Simplify right side
    137.85x = 22,898.08
  5. Step 5: Solve for x
    x = 22,898.08/137.85
  6. Step 6: Final answer
    x = 166.11

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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.