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Finding the Fourth Proportional to 113.02, 169.44 and 108.70

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Solution

The fourth proportional to 113.02, 169.44 and 108.70 is: 162.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.02 : 169.44 = 108.70 : x
  2. Step 2: Convert to fraction form
    113.02/169.44 = 108.70/x
  3. Step 3: Cross multiply
    113.02x = 169.44 × 108.70
  4. Step 4: Simplify right side
    113.02x = 18,418.13
  5. Step 5: Solve for x
    x = 18,418.13/113.02
  6. Step 6: Final answer
    x = 162.96

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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.