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Finding the Fourth Proportional to 75.39, 103.95 and 73.86

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Solution

The fourth proportional to 75.39, 103.95 and 73.86 is: 101.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.39 : 103.95 = 73.86 : x
  2. Step 2: Convert to fraction form
    75.39/103.95 = 73.86/x
  3. Step 3: Cross multiply
    75.39x = 103.95 × 73.86
  4. Step 4: Simplify right side
    75.39x = 7,677.75
  5. Step 5: Solve for x
    x = 7,677.75/75.39
  6. Step 6: Final answer
    x = 101.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.