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Finding the Fourth Proportional to 113.92, 157.26 and 100.96

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Solution

The fourth proportional to 113.92, 157.26 and 100.96 is: 139.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.92 : 157.26 = 100.96 : x
  2. Step 2: Convert to fraction form
    113.92/157.26 = 100.96/x
  3. Step 3: Cross multiply
    113.92x = 157.26 × 100.96
  4. Step 4: Simplify right side
    113.92x = 15,876.97
  5. Step 5: Solve for x
    x = 15,876.97/113.92
  6. Step 6: Final answer
    x = 139.37

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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.