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Finding the Fourth Proportional to 164.23, 226.64 and 90.55

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Solution

The fourth proportional to 164.23, 226.64 and 90.55 is: 124.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    164.23 : 226.64 = 90.55 : x
  2. Step 2: Convert to fraction form
    164.23/226.64 = 90.55/x
  3. Step 3: Cross multiply
    164.23x = 226.64 × 90.55
  4. Step 4: Simplify right side
    164.23x = 20,520.67
  5. Step 5: Solve for x
    x = 20,520.67/164.23
  6. Step 6: Final answer
    x = 124.95

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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.