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Finding the Fourth Proportional to 139,794.19, 209,640.25 and 51,021.43

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Solution

The fourth proportional to 139,794.19, 209,640.25 and 51,021.43 is: 76,513.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,794.19 : 209,640.25 = 51,021.43 : x
  2. Step 2: Convert to fraction form
    139,794.19/209,640.25 = 51,021.43/x
  3. Step 3: Cross multiply
    139,794.19x = 209,640.25 × 51,021.43
  4. Step 4: Simplify right side
    139,794.19x = 10,696,145,340.56
  5. Step 5: Solve for x
    x = 10,696,145,340.56/139,794.19
  6. Step 6: Final answer
    x = 76,513.52

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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.