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Finding the Fourth Proportional to 151.21, 226.55 and 90.23

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Solution

The fourth proportional to 151.21, 226.55 and 90.23 is: 135.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.21 : 226.55 = 90.23 : x
  2. Step 2: Convert to fraction form
    151.21/226.55 = 90.23/x
  3. Step 3: Cross multiply
    151.21x = 226.55 × 90.23
  4. Step 4: Simplify right side
    151.21x = 20,440.19
  5. Step 5: Solve for x
    x = 20,440.19/151.21
  6. Step 6: Final answer
    x = 135.18

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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.