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Finding the Fourth Proportional to 279,415.39, 419,118.99 and 69,053.32

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Solution

The fourth proportional to 279,415.39, 419,118.99 and 69,053.32 is: 103,578.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,415.39 : 419,118.99 = 69,053.32 : x
  2. Step 2: Convert to fraction form
    279,415.39/419,118.99 = 69,053.32/x
  3. Step 3: Cross multiply
    279,415.39x = 419,118.99 × 69,053.32
  4. Step 4: Simplify right side
    279,415.39x = 28,941,557,734.55
  5. Step 5: Solve for x
    x = 28,941,557,734.55/279,415.39
  6. Step 6: Final answer
    x = 103,578.97

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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.