Home / 279,775,017.60-419,694,019.20-85,684,891.20

Finding the Fourth Proportional to 279,775,017.60, 419,694,019.20 and 85,684,891.20

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Solution

The fourth proportional to 279,775,017.60, 419,694,019.20 and 85,684,891.20 is: 128,536,981.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,775,017.60 : 419,694,019.20 = 85,684,891.20 : x
  2. Step 2: Convert to fraction form
    279,775,017.60/419,694,019.20 = 85,684,891.20/x
  3. Step 3: Cross multiply
    279,775,017.60x = 419,694,019.20 × 85,684,891.20
  4. Step 4: Simplify right side
    279,775,017.60x = 35,961,436,372,442,712
  5. Step 5: Solve for x
    x = 35,961,436,372,442,712/279,775,017.60
  6. Step 6: Final answer
    x = 128,536,981.90

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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.