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Finding the Fourth Proportional to 96.82, 145.11 and 45.39

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Solution

The fourth proportional to 96.82, 145.11 and 45.39 is: 68.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.82 : 145.11 = 45.39 : x
  2. Step 2: Convert to fraction form
    96.82/145.11 = 45.39/x
  3. Step 3: Cross multiply
    96.82x = 145.11 × 45.39
  4. Step 4: Simplify right side
    96.82x = 6,586.54
  5. Step 5: Solve for x
    x = 6,586.54/96.82
  6. Step 6: Final answer
    x = 68.03

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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.