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Finding the Fourth Proportional to 142.74, 196.44 and 109.98

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Solution

The fourth proportional to 142.74, 196.44 and 109.98 is: 151.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.74 : 196.44 = 109.98 : x
  2. Step 2: Convert to fraction form
    142.74/196.44 = 109.98/x
  3. Step 3: Cross multiply
    142.74x = 196.44 × 109.98
  4. Step 4: Simplify right side
    142.74x = 21,604.47
  5. Step 5: Solve for x
    x = 21,604.47/142.74
  6. Step 6: Final answer
    x = 151.36

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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.