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Finding the Fourth Proportional to 113.97, 170.99 and 45.54

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Solution

The fourth proportional to 113.97, 170.99 and 45.54 is: 68.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.97 : 170.99 = 45.54 : x
  2. Step 2: Convert to fraction form
    113.97/170.99 = 45.54/x
  3. Step 3: Cross multiply
    113.97x = 170.99 × 45.54
  4. Step 4: Simplify right side
    113.97x = 7,786.66
  5. Step 5: Solve for x
    x = 7,786.66/113.97
  6. Step 6: Final answer
    x = 68.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.