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Finding the Fourth Proportional to 139,067.19, 208,608.85 and 53,678.54

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Solution

The fourth proportional to 139,067.19, 208,608.85 and 53,678.54 is: 80,520.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,067.19 : 208,608.85 = 53,678.54 : x
  2. Step 2: Convert to fraction form
    139,067.19/208,608.85 = 53,678.54/x
  3. Step 3: Cross multiply
    139,067.19x = 208,608.85 × 53,678.54
  4. Step 4: Simplify right side
    139,067.19x = 11,197,817,456.03
  5. Step 5: Solve for x
    x = 11,197,817,456.03/139,067.19
  6. Step 6: Final answer
    x = 80,520.92

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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.