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Finding the Fourth Proportional to 279,753,881.60, 419,462,860.80 and 143,704,985.60

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Solution

The fourth proportional to 279,753,881.60, 419,462,860.80 and 143,704,985.60 is: 215,471,199.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,753,881.60 : 419,462,860.80 = 143,704,985.60 : x
  2. Step 2: Convert to fraction form
    279,753,881.60/419,462,860.80 = 143,704,985.60/x
  3. Step 3: Cross multiply
    279,753,881.60x = 419,462,860.80 × 143,704,985.60
  4. Step 4: Simplify right side
    279,753,881.60x = 60,278,904,370,998,800
  5. Step 5: Solve for x
    x = 60,278,904,370,998,800/279,753,881.60
  6. Step 6: Final answer
    x = 215,471,199.28

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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.