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Finding the Fourth Proportional to 139,163.92, 208,777.72 and 60,291.28

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Solution

The fourth proportional to 139,163.92, 208,777.72 and 60,291.28 is: 90,450.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,163.92 : 208,777.72 = 60,291.28 : x
  2. Step 2: Convert to fraction form
    139,163.92/208,777.72 = 60,291.28/x
  3. Step 3: Cross multiply
    139,163.92x = 208,777.72 × 60,291.28
  4. Step 4: Simplify right side
    139,163.92x = 12,587,475,974.28
  5. Step 5: Solve for x
    x = 12,587,475,974.28/139,163.92
  6. Step 6: Final answer
    x = 90,450.71

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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.