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Finding the Fourth Proportional to 115.28, 173.62 and 103.36

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Solution

The fourth proportional to 115.28, 173.62 and 103.36 is: 155.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.28 : 173.62 = 103.36 : x
  2. Step 2: Convert to fraction form
    115.28/173.62 = 103.36/x
  3. Step 3: Cross multiply
    115.28x = 173.62 × 103.36
  4. Step 4: Simplify right side
    115.28x = 17,945.36
  5. Step 5: Solve for x
    x = 17,945.36/115.28
  6. Step 6: Final answer
    x = 155.67

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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.