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Finding the Fourth Proportional to 73.57, 101.22 and 67.78

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Solution

The fourth proportional to 73.57, 101.22 and 67.78 is: 93.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.57 : 101.22 = 67.78 : x
  2. Step 2: Convert to fraction form
    73.57/101.22 = 67.78/x
  3. Step 3: Cross multiply
    73.57x = 101.22 × 67.78
  4. Step 4: Simplify right side
    73.57x = 6,860.69
  5. Step 5: Solve for x
    x = 6,860.69/73.57
  6. Step 6: Final answer
    x = 93.25

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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.