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Finding the Fourth Proportional to 173.13, 239 and 142.12

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Solution

The fourth proportional to 173.13, 239 and 142.12 is: 196.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.13 : 239 = 142.12 : x
  2. Step 2: Convert to fraction form
    173.13/239 = 142.12/x
  3. Step 3: Cross multiply
    173.13x = 239 × 142.12
  4. Step 4: Simplify right side
    173.13x = 33,966.68
  5. Step 5: Solve for x
    x = 33,966.68/173.13
  6. Step 6: Final answer
    x = 196.19

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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.