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Finding the Fourth Proportional to 155.88, 233.62 and 129.15

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Solution

The fourth proportional to 155.88, 233.62 and 129.15 is: 193.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.88 : 233.62 = 129.15 : x
  2. Step 2: Convert to fraction form
    155.88/233.62 = 129.15/x
  3. Step 3: Cross multiply
    155.88x = 233.62 × 129.15
  4. Step 4: Simplify right side
    155.88x = 30,171.70
  5. Step 5: Solve for x
    x = 30,171.70/155.88
  6. Step 6: Final answer
    x = 193.56

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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.