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Finding the Fourth Proportional to 69.45, 104.10 and 30.92

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Solution

The fourth proportional to 69.45, 104.10 and 30.92 is: 46.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.45 : 104.10 = 30.92 : x
  2. Step 2: Convert to fraction form
    69.45/104.10 = 30.92/x
  3. Step 3: Cross multiply
    69.45x = 104.10 × 30.92
  4. Step 4: Simplify right side
    69.45x = 3,219.11
  5. Step 5: Solve for x
    x = 3,219.11/69.45
  6. Step 6: Final answer
    x = 46.35

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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.