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Finding the Fourth Proportional to 100,997.34, 139,375.38 and 55,056.97

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Solution

The fourth proportional to 100,997.34, 139,375.38 and 55,056.97 is: 75,978.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,997.34 : 139,375.38 = 55,056.97 : x
  2. Step 2: Convert to fraction form
    100,997.34/139,375.38 = 55,056.97/x
  3. Step 3: Cross multiply
    100,997.34x = 139,375.38 × 55,056.97
  4. Step 4: Simplify right side
    100,997.34x = 7,673,586,115.40
  5. Step 5: Solve for x
    x = 7,673,586,115.40/100,997.34
  6. Step 6: Final answer
    x = 75,978.10

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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.