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Finding the Fourth Proportional to 80.08, 109.01 and 79.65

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Solution

The fourth proportional to 80.08, 109.01 and 79.65 is: 108.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.08 : 109.01 = 79.65 : x
  2. Step 2: Convert to fraction form
    80.08/109.01 = 79.65/x
  3. Step 3: Cross multiply
    80.08x = 109.01 × 79.65
  4. Step 4: Simplify right side
    80.08x = 8,682.85
  5. Step 5: Solve for x
    x = 8,682.85/80.08
  6. Step 6: Final answer
    x = 108.43

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.