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Finding the Fourth Proportional to 97.46, 146.09 and 80.36

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Solution

The fourth proportional to 97.46, 146.09 and 80.36 is: 120.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.46 : 146.09 = 80.36 : x
  2. Step 2: Convert to fraction form
    97.46/146.09 = 80.36/x
  3. Step 3: Cross multiply
    97.46x = 146.09 × 80.36
  4. Step 4: Simplify right side
    97.46x = 11,738.66
  5. Step 5: Solve for x
    x = 11,738.66/97.46
  6. Step 6: Final answer
    x = 120.45

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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.