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Finding the Fourth Proportional to 221,091.80, 331,637.69 and 54,879.80

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Solution

The fourth proportional to 221,091.80, 331,637.69 and 54,879.80 is: 82,319.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,091.80 : 331,637.69 = 54,879.80 : x
  2. Step 2: Convert to fraction form
    221,091.80/331,637.69 = 54,879.80/x
  3. Step 3: Cross multiply
    221,091.80x = 331,637.69 × 54,879.80
  4. Step 4: Simplify right side
    221,091.80x = 18,200,208,578.67
  5. Step 5: Solve for x
    x = 18,200,208,578.67/221,091.80
  6. Step 6: Final answer
    x = 82,319.69

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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.