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Finding the Fourth Proportional to 81,891.35, 122,835.64 and 36,887.68

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Solution

The fourth proportional to 81,891.35, 122,835.64 and 36,887.68 is: 55,330.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,891.35 : 122,835.64 = 36,887.68 : x
  2. Step 2: Convert to fraction form
    81,891.35/122,835.64 = 36,887.68/x
  3. Step 3: Cross multiply
    81,891.35x = 122,835.64 × 36,887.68
  4. Step 4: Simplify right side
    81,891.35x = 4,531,121,780.92
  5. Step 5: Solve for x
    x = 4,531,121,780.92/81,891.35
  6. Step 6: Final answer
    x = 55,330.90

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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.