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Finding the Fourth Proportional to 80.34, 110.86 and 49.29

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Solution

The fourth proportional to 80.34, 110.86 and 49.29 is: 68.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.34 : 110.86 = 49.29 : x
  2. Step 2: Convert to fraction form
    80.34/110.86 = 49.29/x
  3. Step 3: Cross multiply
    80.34x = 110.86 × 49.29
  4. Step 4: Simplify right side
    80.34x = 5,463.75
  5. Step 5: Solve for x
    x = 5,463.75/80.34
  6. Step 6: Final answer
    x = 68.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.