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Finding the Fourth Proportional to 73.56, 100.92 and 69.84

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Solution

The fourth proportional to 73.56, 100.92 and 69.84 is: 95.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.56 : 100.92 = 69.84 : x
  2. Step 2: Convert to fraction form
    73.56/100.92 = 69.84/x
  3. Step 3: Cross multiply
    73.56x = 100.92 × 69.84
  4. Step 4: Simplify right side
    73.56x = 7,048.25
  5. Step 5: Solve for x
    x = 7,048.25/73.56
  6. Step 6: Final answer
    x = 95.82

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.