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Finding the Fourth Proportional to 70.41, 105.64 and 41.55

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Solution

The fourth proportional to 70.41, 105.64 and 41.55 is: 62.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.41 : 105.64 = 41.55 : x
  2. Step 2: Convert to fraction form
    70.41/105.64 = 41.55/x
  3. Step 3: Cross multiply
    70.41x = 105.64 × 41.55
  4. Step 4: Simplify right side
    70.41x = 4,388.87
  5. Step 5: Solve for x
    x = 4,388.87/70.41
  6. Step 6: Final answer
    x = 62.33

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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.