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Finding the Fourth Proportional to 205,586.80, 308,380.20 and 72,422.80

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Solution

The fourth proportional to 205,586.80, 308,380.20 and 72,422.80 is: 108,634.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,586.80 : 308,380.20 = 72,422.80 : x
  2. Step 2: Convert to fraction form
    205,586.80/308,380.20 = 72,422.80/x
  3. Step 3: Cross multiply
    205,586.80x = 308,380.20 × 72,422.80
  4. Step 4: Simplify right side
    205,586.80x = 22,333,757,548.56
  5. Step 5: Solve for x
    x = 22,333,757,548.56/205,586.80
  6. Step 6: Final answer
    x = 108,634.20

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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.