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Finding the Fourth Proportional to 73.86, 110.79 and 68.39

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Solution

The fourth proportional to 73.86, 110.79 and 68.39 is: 102.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.86 : 110.79 = 68.39 : x
  2. Step 2: Convert to fraction form
    73.86/110.79 = 68.39/x
  3. Step 3: Cross multiply
    73.86x = 110.79 × 68.39
  4. Step 4: Simplify right side
    73.86x = 7,577.61
  5. Step 5: Solve for x
    x = 7,577.61/73.86
  6. Step 6: Final answer
    x = 102.59

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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.