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Finding the Fourth Proportional to 72.11, 107.93 and 49.33

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Solution

The fourth proportional to 72.11, 107.93 and 49.33 is: 73.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.11 : 107.93 = 49.33 : x
  2. Step 2: Convert to fraction form
    72.11/107.93 = 49.33/x
  3. Step 3: Cross multiply
    72.11x = 107.93 × 49.33
  4. Step 4: Simplify right side
    72.11x = 5,323.84
  5. Step 5: Solve for x
    x = 5,323.84/72.11
  6. Step 6: Final answer
    x = 73.83

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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.