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Finding the Fourth Proportional to 157.76, 217.76 and 133.28

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Solution

The fourth proportional to 157.76, 217.76 and 133.28 is: 183.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.76 : 217.76 = 133.28 : x
  2. Step 2: Convert to fraction form
    157.76/217.76 = 133.28/x
  3. Step 3: Cross multiply
    157.76x = 217.76 × 133.28
  4. Step 4: Simplify right side
    157.76x = 29,023.05
  5. Step 5: Solve for x
    x = 29,023.05/157.76
  6. Step 6: Final answer
    x = 183.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.