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Finding the Fourth Proportional to 279,866.15, 419,797.13 and 80,186.70

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Solution

The fourth proportional to 279,866.15, 419,797.13 and 80,186.70 is: 120,279.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,866.15 : 419,797.13 = 80,186.70 : x
  2. Step 2: Convert to fraction form
    279,866.15/419,797.13 = 80,186.70/x
  3. Step 3: Cross multiply
    279,866.15x = 419,797.13 × 80,186.70
  4. Step 4: Simplify right side
    279,866.15x = 33,662,146,123.24
  5. Step 5: Solve for x
    x = 33,662,146,123.24/279,866.15
  6. Step 6: Final answer
    x = 120,279.45

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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.