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Finding the Fourth Proportional to 218,996.92, 328,553.77 and 69,240.02

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Solution

The fourth proportional to 218,996.92, 328,553.77 and 69,240.02 is: 103,878.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,996.92 : 328,553.77 = 69,240.02 : x
  2. Step 2: Convert to fraction form
    218,996.92/328,553.77 = 69,240.02/x
  3. Step 3: Cross multiply
    218,996.92x = 328,553.77 × 69,240.02
  4. Step 4: Simplify right side
    218,996.92x = 22,749,067,919.83
  5. Step 5: Solve for x
    x = 22,749,067,919.83/218,996.92
  6. Step 6: Final answer
    x = 103,878.49

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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.