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Finding the Fourth Proportional to 203,879.70, 305,819.55 and 54,143.10

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Solution

The fourth proportional to 203,879.70, 305,819.55 and 54,143.10 is: 81,214.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,879.70 : 305,819.55 = 54,143.10 : x
  2. Step 2: Convert to fraction form
    203,879.70/305,819.55 = 54,143.10/x
  3. Step 3: Cross multiply
    203,879.70x = 305,819.55 × 54,143.10
  4. Step 4: Simplify right side
    203,879.70x = 16,558,018,477.61
  5. Step 5: Solve for x
    x = 16,558,018,477.61/203,879.70
  6. Step 6: Final answer
    x = 81,214.65

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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.