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Finding the Fourth Proportional to 101,321.57, 139,819.41 and 55,997.21

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Solution

The fourth proportional to 101,321.57, 139,819.41 and 55,997.21 is: 77,273.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,321.57 : 139,819.41 = 55,997.21 : x
  2. Step 2: Convert to fraction form
    101,321.57/139,819.41 = 55,997.21/x
  3. Step 3: Cross multiply
    101,321.57x = 139,819.41 × 55,997.21
  4. Step 4: Simplify right side
    101,321.57x = 7,829,496,164.75
  5. Step 5: Solve for x
    x = 7,829,496,164.75/101,321.57
  6. Step 6: Final answer
    x = 77,273.74

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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.