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Finding the Fourth Proportional to 139,660.05, 209,594.01 and 68,620.82

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Solution

The fourth proportional to 139,660.05, 209,594.01 and 68,620.82 is: 102,982.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,660.05 : 209,594.01 = 68,620.82 : x
  2. Step 2: Convert to fraction form
    139,660.05/209,594.01 = 68,620.82/x
  3. Step 3: Cross multiply
    139,660.05x = 209,594.01 × 68,620.82
  4. Step 4: Simplify right side
    139,660.05x = 14,382,512,833.29
  5. Step 5: Solve for x
    x = 14,382,512,833.29/139,660.05
  6. Step 6: Final answer
    x = 102,982.30

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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.