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Finding the Fourth Proportional to 113.49, 169.27 and 111.06

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Solution

The fourth proportional to 113.49, 169.27 and 111.06 is: 165.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.49 : 169.27 = 111.06 : x
  2. Step 2: Convert to fraction form
    113.49/169.27 = 111.06/x
  3. Step 3: Cross multiply
    113.49x = 169.27 × 111.06
  4. Step 4: Simplify right side
    113.49x = 18,798.85
  5. Step 5: Solve for x
    x = 18,798.85/113.49
  6. Step 6: Final answer
    x = 165.64

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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.