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Finding the Fourth Proportional to 71.44, 107.12 and 37.21

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Solution

The fourth proportional to 71.44, 107.12 and 37.21 is: 55.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.44 : 107.12 = 37.21 : x
  2. Step 2: Convert to fraction form
    71.44/107.12 = 37.21/x
  3. Step 3: Cross multiply
    71.44x = 107.12 × 37.21
  4. Step 4: Simplify right side
    71.44x = 3,985.94
  5. Step 5: Solve for x
    x = 3,985.94/71.44
  6. Step 6: Final answer
    x = 55.79

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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.