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Finding the Fourth Proportional to 71.77, 107.56 and 41.31

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Solution

The fourth proportional to 71.77, 107.56 and 41.31 is: 61.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.77 : 107.56 = 41.31 : x
  2. Step 2: Convert to fraction form
    71.77/107.56 = 41.31/x
  3. Step 3: Cross multiply
    71.77x = 107.56 × 41.31
  4. Step 4: Simplify right side
    71.77x = 4,443.30
  5. Step 5: Solve for x
    x = 4,443.30/71.77
  6. Step 6: Final answer
    x = 61.91

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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.