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Finding the Fourth Proportional to 72.98, 109.42 and 34.44

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Solution

The fourth proportional to 72.98, 109.42 and 34.44 is: 51.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.98 : 109.42 = 34.44 : x
  2. Step 2: Convert to fraction form
    72.98/109.42 = 34.44/x
  3. Step 3: Cross multiply
    72.98x = 109.42 × 34.44
  4. Step 4: Simplify right side
    72.98x = 3,768.42
  5. Step 5: Solve for x
    x = 3,768.42/72.98
  6. Step 6: Final answer
    x = 51.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.