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Finding the Fourth Proportional to 155.56, 233.22 and 129.82

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Solution

The fourth proportional to 155.56, 233.22 and 129.82 is: 194.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.56 : 233.22 = 129.82 : x
  2. Step 2: Convert to fraction form
    155.56/233.22 = 129.82/x
  3. Step 3: Cross multiply
    155.56x = 233.22 × 129.82
  4. Step 4: Simplify right side
    155.56x = 30,276.62
  5. Step 5: Solve for x
    x = 30,276.62/155.56
  6. Step 6: Final answer
    x = 194.63

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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.