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Finding the Fourth Proportional to 139,272.60, 208,765.89 and 54,998.61

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Solution

The fourth proportional to 139,272.60, 208,765.89 and 54,998.61 is: 82,441.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,272.60 : 208,765.89 = 54,998.61 : x
  2. Step 2: Convert to fraction form
    139,272.60/208,765.89 = 54,998.61/x
  3. Step 3: Cross multiply
    139,272.60x = 208,765.89 × 54,998.61
  4. Step 4: Simplify right side
    139,272.60x = 11,481,833,508.14
  5. Step 5: Solve for x
    x = 11,481,833,508.14/139,272.60
  6. Step 6: Final answer
    x = 82,441.44

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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.