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Finding the Fourth Proportional to 113.30, 168.73 and 106.31

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Solution

The fourth proportional to 113.30, 168.73 and 106.31 is: 158.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.30 : 168.73 = 106.31 : x
  2. Step 2: Convert to fraction form
    113.30/168.73 = 106.31/x
  3. Step 3: Cross multiply
    113.30x = 168.73 × 106.31
  4. Step 4: Simplify right side
    113.30x = 17,938.44
  5. Step 5: Solve for x
    x = 17,938.44/113.30
  6. Step 6: Final answer
    x = 158.33

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.