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Finding the Fourth Proportional to 139,277.54, 208,957.98 and 55,049.60

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Solution

The fourth proportional to 139,277.54, 208,957.98 and 55,049.60 is: 82,590.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,277.54 : 208,957.98 = 55,049.60 : x
  2. Step 2: Convert to fraction form
    139,277.54/208,957.98 = 55,049.60/x
  3. Step 3: Cross multiply
    139,277.54x = 208,957.98 × 55,049.60
  4. Step 4: Simplify right side
    139,277.54x = 11,503,053,215.81
  5. Step 5: Solve for x
    x = 11,503,053,215.81/139,277.54
  6. Step 6: Final answer
    x = 82,590.87

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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.