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Finding the Fourth Proportional to 74.44, 103.25 and 72.46

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Solution

The fourth proportional to 74.44, 103.25 and 72.46 is: 100.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.44 : 103.25 = 72.46 : x
  2. Step 2: Convert to fraction form
    74.44/103.25 = 72.46/x
  3. Step 3: Cross multiply
    74.44x = 103.25 × 72.46
  4. Step 4: Simplify right side
    74.44x = 7,481.50
  5. Step 5: Solve for x
    x = 7,481.50/74.44
  6. Step 6: Final answer
    x = 100.50

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.