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Finding the Fourth Proportional to 279,431,996.80, 419,147,995.20 and 97,660,220.80

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Solution

The fourth proportional to 279,431,996.80, 419,147,995.20 and 97,660,220.80 is: 146,490,331.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,431,996.80 : 419,147,995.20 = 97,660,220.80 : x
  2. Step 2: Convert to fraction form
    279,431,996.80/419,147,995.20 = 97,660,220.80/x
  3. Step 3: Cross multiply
    279,431,996.80x = 419,147,995.20 × 97,660,220.80
  4. Step 4: Simplify right side
    279,431,996.80x = 40,934,085,759,109,336
  5. Step 5: Solve for x
    x = 40,934,085,759,109,336/279,431,996.80
  6. Step 6: Final answer
    x = 146,490,331.20

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Similar ratio
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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.