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Finding the Fourth Proportional to 139,481.94, 192,485.22 and 75,819.74

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Solution

The fourth proportional to 139,481.94, 192,485.22 and 75,819.74 is: 104,631.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,481.94 : 192,485.22 = 75,819.74 : x
  2. Step 2: Convert to fraction form
    139,481.94/192,485.22 = 75,819.74/x
  3. Step 3: Cross multiply
    139,481.94x = 192,485.22 × 75,819.74
  4. Step 4: Simplify right side
    139,481.94x = 14,594,179,334.24
  5. Step 5: Solve for x
    x = 14,594,179,334.24/139,481.94
  6. Step 6: Final answer
    x = 104,631.32

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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.