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Finding the Fourth Proportional to 115.16, 173.37 and 100.81

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Solution

The fourth proportional to 115.16, 173.37 and 100.81 is: 151.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.16 : 173.37 = 100.81 : x
  2. Step 2: Convert to fraction form
    115.16/173.37 = 100.81/x
  3. Step 3: Cross multiply
    115.16x = 173.37 × 100.81
  4. Step 4: Simplify right side
    115.16x = 17,476.44
  5. Step 5: Solve for x
    x = 17,476.44/115.16
  6. Step 6: Final answer
    x = 151.76

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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.