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Finding the Fourth Proportional to 139,481.98, 209,144.22 and 127,579.92

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Solution

The fourth proportional to 139,481.98, 209,144.22 and 127,579.92 is: 191,297.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,481.98 : 209,144.22 = 127,579.92 : x
  2. Step 2: Convert to fraction form
    139,481.98/209,144.22 = 127,579.92/x
  3. Step 3: Cross multiply
    139,481.98x = 209,144.22 × 127,579.92
  4. Step 4: Simplify right side
    139,481.98x = 26,682,602,856.06
  5. Step 5: Solve for x
    x = 26,682,602,856.06/139,481.98
  6. Step 6: Final answer
    x = 191,297.85

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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.