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Finding the Fourth Proportional to 221,091.87, 331,637.79 and 54,879.87

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Solution

The fourth proportional to 221,091.87, 331,637.79 and 54,879.87 is: 82,319.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,091.87 : 331,637.79 = 54,879.87 : x
  2. Step 2: Convert to fraction form
    221,091.87/331,637.79 = 54,879.87/x
  3. Step 3: Cross multiply
    221,091.87x = 331,637.79 × 54,879.87
  4. Step 4: Simplify right side
    221,091.87x = 18,200,238,802.29
  5. Step 5: Solve for x
    x = 18,200,238,802.29/221,091.87
  6. Step 6: Final answer
    x = 82,319.80

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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.