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Finding the Fourth Proportional to 206,572.80, 309,859.20 and 117,999.30

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Solution

The fourth proportional to 206,572.80, 309,859.20 and 117,999.30 is: 176,998.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,572.80 : 309,859.20 = 117,999.30 : x
  2. Step 2: Convert to fraction form
    206,572.80/309,859.20 = 117,999.30/x
  3. Step 3: Cross multiply
    206,572.80x = 309,859.20 × 117,999.30
  4. Step 4: Simplify right side
    206,572.80x = 36,563,168,698.56
  5. Step 5: Solve for x
    x = 36,563,168,698.56/206,572.80
  6. Step 6: Final answer
    x = 176,998.95

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1.5x scale

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.