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Finding the Fourth Proportional to 72.33, 107.99 and 67.98

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Solution

The fourth proportional to 72.33, 107.99 and 67.98 is: 101.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.33 : 107.99 = 67.98 : x
  2. Step 2: Convert to fraction form
    72.33/107.99 = 67.98/x
  3. Step 3: Cross multiply
    72.33x = 107.99 × 67.98
  4. Step 4: Simplify right side
    72.33x = 7,340.82
  5. Step 5: Solve for x
    x = 7,340.82/72.33
  6. Step 6: Final answer
    x = 101.49

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.