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Finding the Fourth Proportional to 115.22, 173.68 and 107.80

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Solution

The fourth proportional to 115.22, 173.68 and 107.80 is: 162.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.22 : 173.68 = 107.80 : x
  2. Step 2: Convert to fraction form
    115.22/173.68 = 107.80/x
  3. Step 3: Cross multiply
    115.22x = 173.68 × 107.80
  4. Step 4: Simplify right side
    115.22x = 18,722.70
  5. Step 5: Solve for x
    x = 18,722.70/115.22
  6. Step 6: Final answer
    x = 162.50

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.