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Finding the Fourth Proportional to 80.02, 119.17 and 77.32

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Solution

The fourth proportional to 80.02, 119.17 and 77.32 is: 115.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.02 : 119.17 = 77.32 : x
  2. Step 2: Convert to fraction form
    80.02/119.17 = 77.32/x
  3. Step 3: Cross multiply
    80.02x = 119.17 × 77.32
  4. Step 4: Simplify right side
    80.02x = 9,214.22
  5. Step 5: Solve for x
    x = 9,214.22/80.02
  6. Step 6: Final answer
    x = 115.15

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.