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Finding the Fourth Proportional to 156.89, 234.01 and 133.80

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Solution

The fourth proportional to 156.89, 234.01 and 133.80 is: 199.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.89 : 234.01 = 133.80 : x
  2. Step 2: Convert to fraction form
    156.89/234.01 = 133.80/x
  3. Step 3: Cross multiply
    156.89x = 234.01 × 133.80
  4. Step 4: Simplify right side
    156.89x = 31,310.54
  5. Step 5: Solve for x
    x = 31,310.54/156.89
  6. Step 6: Final answer
    x = 199.57

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.