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Finding the Fourth Proportional to 139,273.22, 192,201.46 and 78,842.77

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Solution

The fourth proportional to 139,273.22, 192,201.46 and 78,842.77 is: 108,805.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,273.22 : 192,201.46 = 78,842.77 : x
  2. Step 2: Convert to fraction form
    139,273.22/192,201.46 = 78,842.77/x
  3. Step 3: Cross multiply
    139,273.22x = 192,201.46 × 78,842.77
  4. Step 4: Simplify right side
    139,273.22x = 15,153,694,826.83
  5. Step 5: Solve for x
    x = 15,153,694,826.83/139,273.22
  6. Step 6: Final answer
    x = 108,805.52

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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.