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Finding the Fourth Proportional to 200,000.80, 300,001.20 and 81,611.20

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Solution

The fourth proportional to 200,000.80, 300,001.20 and 81,611.20 is: 122,416.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,000.80 : 300,001.20 = 81,611.20 : x
  2. Step 2: Convert to fraction form
    200,000.80/300,001.20 = 81,611.20/x
  3. Step 3: Cross multiply
    200,000.80x = 300,001.20 × 81,611.20
  4. Step 4: Simplify right side
    200,000.80x = 24,483,457,933.44
  5. Step 5: Solve for x
    x = 24,483,457,933.44/200,000.80
  6. Step 6: Final answer
    x = 122,416.80

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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.