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Finding the Fourth Proportional to 115.26, 172.71 and 88.26

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Solution

The fourth proportional to 115.26, 172.71 and 88.26 is: 132.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.26 : 172.71 = 88.26 : x
  2. Step 2: Convert to fraction form
    115.26/172.71 = 88.26/x
  3. Step 3: Cross multiply
    115.26x = 172.71 × 88.26
  4. Step 4: Simplify right side
    115.26x = 15,243.38
  5. Step 5: Solve for x
    x = 15,243.38/115.26
  6. Step 6: Final answer
    x = 132.25

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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.