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Finding the Fourth Proportional to 104.28, 157.17 and 99.08

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Solution

The fourth proportional to 104.28, 157.17 and 99.08 is: 149.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.28 : 157.17 = 99.08 : x
  2. Step 2: Convert to fraction form
    104.28/157.17 = 99.08/x
  3. Step 3: Cross multiply
    104.28x = 157.17 × 99.08
  4. Step 4: Simplify right side
    104.28x = 15,572.40
  5. Step 5: Solve for x
    x = 15,572.40/104.28
  6. Step 6: Final answer
    x = 149.33

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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.