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Finding the Fourth Proportional to 143,469.92, 215,161.12 and 115,323.20

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Solution

The fourth proportional to 143,469.92, 215,161.12 and 115,323.20 is: 172,949.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,469.92 : 215,161.12 = 115,323.20 : x
  2. Step 2: Convert to fraction form
    143,469.92/215,161.12 = 115,323.20/x
  3. Step 3: Cross multiply
    143,469.92x = 215,161.12 × 115,323.20
  4. Step 4: Simplify right side
    143,469.92x = 24,813,068,873.98
  5. Step 5: Solve for x
    x = 24,813,068,873.98/143,469.92
  6. Step 6: Final answer
    x = 172,949.63

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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.