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Finding the Fourth Proportional to 113.06, 169.43 and 80.49

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Solution

The fourth proportional to 113.06, 169.43 and 80.49 is: 120.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.06 : 169.43 = 80.49 : x
  2. Step 2: Convert to fraction form
    113.06/169.43 = 80.49/x
  3. Step 3: Cross multiply
    113.06x = 169.43 × 80.49
  4. Step 4: Simplify right side
    113.06x = 13,637.65
  5. Step 5: Solve for x
    x = 13,637.65/113.06
  6. Step 6: Final answer
    x = 120.62

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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.