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Finding the Fourth Proportional to 139,911.60, 193,078.24 and 76,249.38

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Solution

The fourth proportional to 139,911.60, 193,078.24 and 76,249.38 is: 105,224.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,911.60 : 193,078.24 = 76,249.38 : x
  2. Step 2: Convert to fraction form
    139,911.60/193,078.24 = 76,249.38/x
  3. Step 3: Cross multiply
    139,911.60x = 193,078.24 × 76,249.38
  4. Step 4: Simplify right side
    139,911.60x = 14,722,096,091.49
  5. Step 5: Solve for x
    x = 14,722,096,091.49/139,911.60
  6. Step 6: Final answer
    x = 105,224.27

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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.