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Finding the Fourth Proportional to 69.11, 103.67 and 48.75

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Solution

The fourth proportional to 69.11, 103.67 and 48.75 is: 73.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.11 : 103.67 = 48.75 : x
  2. Step 2: Convert to fraction form
    69.11/103.67 = 48.75/x
  3. Step 3: Cross multiply
    69.11x = 103.67 × 48.75
  4. Step 4: Simplify right side
    69.11x = 5,053.67
  5. Step 5: Solve for x
    x = 5,053.67/69.11
  6. Step 6: Final answer
    x = 73.13

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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.