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Finding the Fourth Proportional to 105.78, 158.67 and 44.87

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Solution

The fourth proportional to 105.78, 158.67 and 44.87 is: 67.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.78 : 158.67 = 44.87 : x
  2. Step 2: Convert to fraction form
    105.78/158.67 = 44.87/x
  3. Step 3: Cross multiply
    105.78x = 158.67 × 44.87
  4. Step 4: Simplify right side
    105.78x = 7,120.02
  5. Step 5: Solve for x
    x = 7,120.02/105.78
  6. Step 6: Final answer
    x = 67.31

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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.