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Finding the Fourth Proportional to 157.97, 218.05 and 92.49

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Solution

The fourth proportional to 157.97, 218.05 and 92.49 is: 127.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.97 : 218.05 = 92.49 : x
  2. Step 2: Convert to fraction form
    157.97/218.05 = 92.49/x
  3. Step 3: Cross multiply
    157.97x = 218.05 × 92.49
  4. Step 4: Simplify right side
    157.97x = 20,167.44
  5. Step 5: Solve for x
    x = 20,167.44/157.97
  6. Step 6: Final answer
    x = 127.67

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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.