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Finding the Fourth Proportional to 279,978.87, 419,968.18 and 69,616.81

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Solution

The fourth proportional to 279,978.87, 419,968.18 and 69,616.81 is: 104,425.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,978.87 : 419,968.18 = 69,616.81 : x
  2. Step 2: Convert to fraction form
    279,978.87/419,968.18 = 69,616.81/x
  3. Step 3: Cross multiply
    279,978.87x = 419,968.18 × 69,616.81
  4. Step 4: Simplify right side
    279,978.87x = 29,236,844,993.11
  5. Step 5: Solve for x
    x = 29,236,844,993.11/279,978.87
  6. Step 6: Final answer
    x = 104,425.18

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.