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Finding the Fourth Proportional to 71.90, 107.72 and 41.48

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Solution

The fourth proportional to 71.90, 107.72 and 41.48 is: 62.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.90 : 107.72 = 41.48 : x
  2. Step 2: Convert to fraction form
    71.90/107.72 = 41.48/x
  3. Step 3: Cross multiply
    71.90x = 107.72 × 41.48
  4. Step 4: Simplify right side
    71.90x = 4,468.23
  5. Step 5: Solve for x
    x = 4,468.23/71.90
  6. Step 6: Final answer
    x = 62.15

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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.