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Finding the Fourth Proportional to 115.45, 173.22 and 61.35

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Solution

The fourth proportional to 115.45, 173.22 and 61.35 is: 92.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.45 : 173.22 = 61.35 : x
  2. Step 2: Convert to fraction form
    115.45/173.22 = 61.35/x
  3. Step 3: Cross multiply
    115.45x = 173.22 × 61.35
  4. Step 4: Simplify right side
    115.45x = 10,627.05
  5. Step 5: Solve for x
    x = 10,627.05/115.45
  6. Step 6: Final answer
    x = 92.05

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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.