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Finding the Fourth Proportional to 109.04, 162.74 and 105.68

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Solution

The fourth proportional to 109.04, 162.74 and 105.68 is: 157.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.04 : 162.74 = 105.68 : x
  2. Step 2: Convert to fraction form
    109.04/162.74 = 105.68/x
  3. Step 3: Cross multiply
    109.04x = 162.74 × 105.68
  4. Step 4: Simplify right side
    109.04x = 17,198.36
  5. Step 5: Solve for x
    x = 17,198.36/109.04
  6. Step 6: Final answer
    x = 157.73

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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.