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Finding the Fourth Proportional to 279,936,701.80, 420,115,004.70 and 143,551,882.60

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Solution

The fourth proportional to 279,936,701.80, 420,115,004.70 and 143,551,882.60 is: 215,435,487.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,936,701.80 : 420,115,004.70 = 143,551,882.60 : x
  2. Step 2: Convert to fraction form
    279,936,701.80/420,115,004.70 = 143,551,882.60/x
  3. Step 3: Cross multiply
    279,936,701.80x = 420,115,004.70 × 143,551,882.60
  4. Step 4: Simplify right side
    279,936,701.80x = 60,308,299,833,192,848
  5. Step 5: Solve for x
    x = 60,308,299,833,192,848/279,936,701.80
  6. Step 6: Final answer
    x = 215,435,487.54

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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.