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Finding the Fourth Proportional to 157.46, 217.14 and 134.21

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Solution

The fourth proportional to 157.46, 217.14 and 134.21 is: 185.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.46 : 217.14 = 134.21 : x
  2. Step 2: Convert to fraction form
    157.46/217.14 = 134.21/x
  3. Step 3: Cross multiply
    157.46x = 217.14 × 134.21
  4. Step 4: Simplify right side
    157.46x = 29,141.27
  5. Step 5: Solve for x
    x = 29,141.27/157.46
  6. Step 6: Final answer
    x = 185.08

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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.