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Finding the Fourth Proportional to 157.43, 236.19 and 84.27

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Solution

The fourth proportional to 157.43, 236.19 and 84.27 is: 126.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.43 : 236.19 = 84.27 : x
  2. Step 2: Convert to fraction form
    157.43/236.19 = 84.27/x
  3. Step 3: Cross multiply
    157.43x = 236.19 × 84.27
  4. Step 4: Simplify right side
    157.43x = 19,903.73
  5. Step 5: Solve for x
    x = 19,903.73/157.43
  6. Step 6: Final answer
    x = 126.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.