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Finding the Fourth Proportional to 279,980.36, 419,972.12 and 69,618.32

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Solution

The fourth proportional to 279,980.36, 419,972.12 and 69,618.32 is: 104,427.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,980.36 : 419,972.12 = 69,618.32 : x
  2. Step 2: Convert to fraction form
    279,980.36/419,972.12 = 69,618.32/x
  3. Step 3: Cross multiply
    279,980.36x = 419,972.12 × 69,618.32
  4. Step 4: Simplify right side
    279,980.36x = 29,237,753,441.24
  5. Step 5: Solve for x
    x = 29,237,753,441.24/279,980.36
  6. Step 6: Final answer
    x = 104,427.87

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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.