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Finding the Fourth Proportional to 137,231.40, 205,795.90 and 54,108.20

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Solution

The fourth proportional to 137,231.40, 205,795.90 and 54,108.20 is: 81,142.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,231.40 : 205,795.90 = 54,108.20 : x
  2. Step 2: Convert to fraction form
    137,231.40/205,795.90 = 54,108.20/x
  3. Step 3: Cross multiply
    137,231.40x = 205,795.90 × 54,108.20
  4. Step 4: Simplify right side
    137,231.40x = 11,135,245,716.38
  5. Step 5: Solve for x
    x = 11,135,245,716.38/137,231.40
  6. Step 6: Final answer
    x = 81,142.11

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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.