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Finding the Fourth Proportional to 142.39, 196.14 and 114.68

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Solution

The fourth proportional to 142.39, 196.14 and 114.68 is: 157.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.39 : 196.14 = 114.68 : x
  2. Step 2: Convert to fraction form
    142.39/196.14 = 114.68/x
  3. Step 3: Cross multiply
    142.39x = 196.14 × 114.68
  4. Step 4: Simplify right side
    142.39x = 22,493.61
  5. Step 5: Solve for x
    x = 22,493.61/142.39
  6. Step 6: Final answer
    x = 157.97

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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.