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Finding the Fourth Proportional to 103.28, 142.29 and 96.56

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Solution

The fourth proportional to 103.28, 142.29 and 96.56 is: 133.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.28 : 142.29 = 96.56 : x
  2. Step 2: Convert to fraction form
    103.28/142.29 = 96.56/x
  3. Step 3: Cross multiply
    103.28x = 142.29 × 96.56
  4. Step 4: Simplify right side
    103.28x = 13,739.52
  5. Step 5: Solve for x
    x = 13,739.52/103.28
  6. Step 6: Final answer
    x = 133.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.