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Finding the Fourth Proportional to 279,505.88, 419,253.85 and 69,143.82

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Solution

The fourth proportional to 279,505.88, 419,253.85 and 69,143.82 is: 103,714.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,505.88 : 419,253.85 = 69,143.82 : x
  2. Step 2: Convert to fraction form
    279,505.88/419,253.85 = 69,143.82/x
  3. Step 3: Cross multiply
    279,505.88x = 419,253.85 × 69,143.82
  4. Step 4: Simplify right side
    279,505.88x = 28,988,812,738.71
  5. Step 5: Solve for x
    x = 28,988,812,738.71/279,505.88
  6. Step 6: Final answer
    x = 103,714.50

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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.