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Finding the Fourth Proportional to 279,398,560.80, 419,097,841.20 and 85,309,600.80

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Solution

The fourth proportional to 279,398,560.80, 419,097,841.20 and 85,309,600.80 is: 127,964,401.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,398,560.80 : 419,097,841.20 = 85,309,600.80 : x
  2. Step 2: Convert to fraction form
    279,398,560.80/419,097,841.20 = 85,309,600.80/x
  3. Step 3: Cross multiply
    279,398,560.80x = 419,097,841.20 × 85,309,600.80
  4. Step 4: Simplify right side
    279,398,560.80x = 35,753,069,528,913,792
  5. Step 5: Solve for x
    x = 35,753,069,528,913,792/279,398,560.80
  6. Step 6: Final answer
    x = 127,964,401.20

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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.