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Finding the Fourth Proportional to 279,976.01, 419,963.88 and 69,613.94

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Solution

The fourth proportional to 279,976.01, 419,963.88 and 69,613.94 is: 104,420.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,976.01 : 419,963.88 = 69,613.94 : x
  2. Step 2: Convert to fraction form
    279,976.01/419,963.88 = 69,613.94/x
  3. Step 3: Cross multiply
    279,976.01x = 419,963.88 × 69,613.94
  4. Step 4: Simplify right side
    279,976.01x = 29,235,338,244.67
  5. Step 5: Solve for x
    x = 29,235,338,244.67/279,976.01
  6. Step 6: Final answer
    x = 104,420.87

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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.