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Finding the Fourth Proportional to 50,563.87, 75,879.65 and 20,981.72

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Solution

The fourth proportional to 50,563.87, 75,879.65 and 20,981.72 is: 31,486.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,563.87 : 75,879.65 = 20,981.72 : x
  2. Step 2: Convert to fraction form
    50,563.87/75,879.65 = 20,981.72/x
  3. Step 3: Cross multiply
    50,563.87x = 75,879.65 × 20,981.72
  4. Step 4: Simplify right side
    50,563.87x = 1,592,085,812.15
  5. Step 5: Solve for x
    x = 1,592,085,812.15/50,563.87
  6. Step 6: Final answer
    x = 31,486.63

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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.