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Finding the Fourth Proportional to 80.08, 119.48 and 66.64

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Solution

The fourth proportional to 80.08, 119.48 and 66.64 is: 99.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.08 : 119.48 = 66.64 : x
  2. Step 2: Convert to fraction form
    80.08/119.48 = 66.64/x
  3. Step 3: Cross multiply
    80.08x = 119.48 × 66.64
  4. Step 4: Simplify right side
    80.08x = 7,962.15
  5. Step 5: Solve for x
    x = 7,962.15/80.08
  6. Step 6: Final answer
    x = 99.43

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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.