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Finding the Fourth Proportional to 192,429.87, 288,390.39 and 139,299.40

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Solution

The fourth proportional to 192,429.87, 288,390.39 and 139,299.40 is: 208,764.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,429.87 : 288,390.39 = 139,299.40 : x
  2. Step 2: Convert to fraction form
    192,429.87/288,390.39 = 139,299.40/x
  3. Step 3: Cross multiply
    192,429.87x = 288,390.39 × 139,299.40
  4. Step 4: Simplify right side
    192,429.87x = 40,172,608,292.77
  5. Step 5: Solve for x
    x = 40,172,608,292.77/192,429.87
  6. Step 6: Final answer
    x = 208,764.93

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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.