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Finding the Fourth Proportional to 157.94, 217.96 and 92.45

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Solution

The fourth proportional to 157.94, 217.96 and 92.45 is: 127.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.94 : 217.96 = 92.45 : x
  2. Step 2: Convert to fraction form
    157.94/217.96 = 92.45/x
  3. Step 3: Cross multiply
    157.94x = 217.96 × 92.45
  4. Step 4: Simplify right side
    157.94x = 20,148.85
  5. Step 5: Solve for x
    x = 20,148.85/157.94
  6. Step 6: Final answer
    x = 127.57

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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.