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Finding the Fourth Proportional to 134.72, 202.07 and 80.94

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Solution

The fourth proportional to 134.72, 202.07 and 80.94 is: 121.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.72 : 202.07 = 80.94 : x
  2. Step 2: Convert to fraction form
    134.72/202.07 = 80.94/x
  3. Step 3: Cross multiply
    134.72x = 202.07 × 80.94
  4. Step 4: Simplify right side
    134.72x = 16,355.14
  5. Step 5: Solve for x
    x = 16,355.14/134.72
  6. Step 6: Final answer
    x = 121.41

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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.