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Finding the Fourth Proportional to 104.28, 157.03 and 84.03

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Solution

The fourth proportional to 104.28, 157.03 and 84.03 is: 126.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.28 : 157.03 = 84.03 : x
  2. Step 2: Convert to fraction form
    104.28/157.03 = 84.03/x
  3. Step 3: Cross multiply
    104.28x = 157.03 × 84.03
  4. Step 4: Simplify right side
    104.28x = 13,195.23
  5. Step 5: Solve for x
    x = 13,195.23/104.28
  6. Step 6: Final answer
    x = 126.54

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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.