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Finding the Fourth Proportional to 173.80, 239.82 and 100.11

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Solution

The fourth proportional to 173.80, 239.82 and 100.11 is: 138.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.80 : 239.82 = 100.11 : x
  2. Step 2: Convert to fraction form
    173.80/239.82 = 100.11/x
  3. Step 3: Cross multiply
    173.80x = 239.82 × 100.11
  4. Step 4: Simplify right side
    173.80x = 24,008.38
  5. Step 5: Solve for x
    x = 24,008.38/173.80
  6. Step 6: Final answer
    x = 138.14

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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.