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Finding the Fourth Proportional to 73.42, 109.43 and 69.76

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Solution

The fourth proportional to 73.42, 109.43 and 69.76 is: 103.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.42 : 109.43 = 69.76 : x
  2. Step 2: Convert to fraction form
    73.42/109.43 = 69.76/x
  3. Step 3: Cross multiply
    73.42x = 109.43 × 69.76
  4. Step 4: Simplify right side
    73.42x = 7,633.84
  5. Step 5: Solve for x
    x = 7,633.84/73.42
  6. Step 6: Final answer
    x = 103.97

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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.