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Finding the Fourth Proportional to 206,136.80, 309,205.20 and 164,664.80

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Solution

The fourth proportional to 206,136.80, 309,205.20 and 164,664.80 is: 246,997.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,136.80 : 309,205.20 = 164,664.80 : x
  2. Step 2: Convert to fraction form
    206,136.80/309,205.20 = 164,664.80/x
  3. Step 3: Cross multiply
    206,136.80x = 309,205.20 × 164,664.80
  4. Step 4: Simplify right side
    206,136.80x = 50,915,212,416.96
  5. Step 5: Solve for x
    x = 50,915,212,416.96/206,136.80
  6. Step 6: Final answer
    x = 246,997.20

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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.