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Finding the Fourth Proportional to 139,279.54, 208,960.98 and 55,051.60

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Solution

The fourth proportional to 139,279.54, 208,960.98 and 55,051.60 is: 82,593.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,279.54 : 208,960.98 = 55,051.60 : x
  2. Step 2: Convert to fraction form
    139,279.54/208,960.98 = 55,051.60/x
  3. Step 3: Cross multiply
    139,279.54x = 208,960.98 × 55,051.60
  4. Step 4: Simplify right side
    139,279.54x = 11,503,636,286.57
  5. Step 5: Solve for x
    x = 11,503,636,286.57/139,279.54
  6. Step 6: Final answer
    x = 82,593.87

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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.