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Finding the Fourth Proportional to 164.21, 226.73 and 98.79

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Solution

The fourth proportional to 164.21, 226.73 and 98.79 is: 136.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    164.21 : 226.73 = 98.79 : x
  2. Step 2: Convert to fraction form
    164.21/226.73 = 98.79/x
  3. Step 3: Cross multiply
    164.21x = 226.73 × 98.79
  4. Step 4: Simplify right side
    164.21x = 22,398.16
  5. Step 5: Solve for x
    x = 22,398.16/164.21
  6. Step 6: Final answer
    x = 136.40

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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.