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Finding the Fourth Proportional to 74.43, 110.99 and 69.47

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Solution

The fourth proportional to 74.43, 110.99 and 69.47 is: 103.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.43 : 110.99 = 69.47 : x
  2. Step 2: Convert to fraction form
    74.43/110.99 = 69.47/x
  3. Step 3: Cross multiply
    74.43x = 110.99 × 69.47
  4. Step 4: Simplify right side
    74.43x = 7,709.57
  5. Step 5: Solve for x
    x = 7,709.57/74.43
  6. Step 6: Final answer
    x = 103.58

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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.