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Finding the Fourth Proportional to 164.21, 226.61 and 106.09

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Solution

The fourth proportional to 164.21, 226.61 and 106.09 is: 146.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    164.21 : 226.61 = 106.09 : x
  2. Step 2: Convert to fraction form
    164.21/226.61 = 106.09/x
  3. Step 3: Cross multiply
    164.21x = 226.61 × 106.09
  4. Step 4: Simplify right side
    164.21x = 24,039.96
  5. Step 5: Solve for x
    x = 24,039.96/164.21
  6. Step 6: Final answer
    x = 146.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.