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Finding the Fourth Proportional to 279,145.98, 418,719.20 and 68,783.94

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Solution

The fourth proportional to 279,145.98, 418,719.20 and 68,783.94 is: 103,175.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,145.98 : 418,719.20 = 68,783.94 : x
  2. Step 2: Convert to fraction form
    279,145.98/418,719.20 = 68,783.94/x
  3. Step 3: Cross multiply
    279,145.98x = 418,719.20 × 68,783.94
  4. Step 4: Simplify right side
    279,145.98x = 28,801,156,329.65
  5. Step 5: Solve for x
    x = 28,801,156,329.65/279,145.98
  6. Step 6: Final answer
    x = 103,175.97

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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.