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Finding the Fourth Proportional to 115.50, 172.21 and 110.94

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Solution

The fourth proportional to 115.50, 172.21 and 110.94 is: 165.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.50 : 172.21 = 110.94 : x
  2. Step 2: Convert to fraction form
    115.50/172.21 = 110.94/x
  3. Step 3: Cross multiply
    115.50x = 172.21 × 110.94
  4. Step 4: Simplify right side
    115.50x = 19,104.98
  5. Step 5: Solve for x
    x = 19,104.98/115.50
  6. Step 6: Final answer
    x = 165.41

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.