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Finding the Fourth Proportional to 80.09, 120.27 and 71.57

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Solution

The fourth proportional to 80.09, 120.27 and 71.57 is: 107.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.09 : 120.27 = 71.57 : x
  2. Step 2: Convert to fraction form
    80.09/120.27 = 71.57/x
  3. Step 3: Cross multiply
    80.09x = 120.27 × 71.57
  4. Step 4: Simplify right side
    80.09x = 8,607.72
  5. Step 5: Solve for x
    x = 8,607.72/80.09
  6. Step 6: Final answer
    x = 107.48

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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.