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Finding the Fourth Proportional to 74.18, 110.65 and 69.73

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Solution

The fourth proportional to 74.18, 110.65 and 69.73 is: 104.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.18 : 110.65 = 69.73 : x
  2. Step 2: Convert to fraction form
    74.18/110.65 = 69.73/x
  3. Step 3: Cross multiply
    74.18x = 110.65 × 69.73
  4. Step 4: Simplify right side
    74.18x = 7,715.30
  5. Step 5: Solve for x
    x = 7,715.30/74.18
  6. Step 6: Final answer
    x = 104.00

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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.