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Finding the Fourth Proportional to 279,775,014.60, 419,694,014.70 and 85,684,888.20

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Solution

The fourth proportional to 279,775,014.60, 419,694,014.70 and 85,684,888.20 is: 128,536,977.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,775,014.60 : 419,694,014.70 = 85,684,888.20 : x
  2. Step 2: Convert to fraction form
    279,775,014.60/419,694,014.70 = 85,684,888.20/x
  3. Step 3: Cross multiply
    279,775,014.60x = 419,694,014.70 × 85,684,888.20
  4. Step 4: Simplify right side
    279,775,014.60x = 35,961,434,727,778,656
  5. Step 5: Solve for x
    x = 35,961,434,727,778,656/279,775,014.60
  6. Step 6: Final answer
    x = 128,536,977.40

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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.