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Finding the Fourth Proportional to 155.01, 232.25 and 81.80

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Solution

The fourth proportional to 155.01, 232.25 and 81.80 is: 122.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.01 : 232.25 = 81.80 : x
  2. Step 2: Convert to fraction form
    155.01/232.25 = 81.80/x
  3. Step 3: Cross multiply
    155.01x = 232.25 × 81.80
  4. Step 4: Simplify right side
    155.01x = 18,996.48
  5. Step 5: Solve for x
    x = 18,996.48/155.01
  6. Step 6: Final answer
    x = 122.55

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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.