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Finding the Fourth Proportional to 279,145.48, 418,718.45 and 68,783.44

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Solution

The fourth proportional to 279,145.48, 418,718.45 and 68,783.44 is: 103,175.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,145.48 : 418,718.45 = 68,783.44 : x
  2. Step 2: Convert to fraction form
    279,145.48/418,718.45 = 68,783.44/x
  3. Step 3: Cross multiply
    279,145.48x = 418,718.45 × 68,783.44
  4. Step 4: Simplify right side
    279,145.48x = 28,800,895,382.47
  5. Step 5: Solve for x
    x = 28,800,895,382.47/279,145.48
  6. Step 6: Final answer
    x = 103,175.22

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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.