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Finding the Fourth Proportional to 206,542.20, 309,813.30 and 183,991.80

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Solution

The fourth proportional to 206,542.20, 309,813.30 and 183,991.80 is: 275,987.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,542.20 : 309,813.30 = 183,991.80 : x
  2. Step 2: Convert to fraction form
    206,542.20/309,813.30 = 183,991.80/x
  3. Step 3: Cross multiply
    206,542.20x = 309,813.30 × 183,991.80
  4. Step 4: Simplify right side
    206,542.20x = 57,003,106,730.94
  5. Step 5: Solve for x
    x = 57,003,106,730.94/206,542.20
  6. Step 6: Final answer
    x = 275,987.70

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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.