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Finding the Fourth Proportional to 199,997.80, 299,996.70 and 81,608.20

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Solution

The fourth proportional to 199,997.80, 299,996.70 and 81,608.20 is: 122,412.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,997.80 : 299,996.70 = 81,608.20 : x
  2. Step 2: Convert to fraction form
    199,997.80/299,996.70 = 81,608.20/x
  3. Step 3: Cross multiply
    199,997.80x = 299,996.70 × 81,608.20
  4. Step 4: Simplify right side
    199,997.80x = 24,482,190,692.94
  5. Step 5: Solve for x
    x = 24,482,190,692.94/199,997.80
  6. Step 6: Final answer
    x = 122,412.30

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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.