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Finding the Fourth Proportional to 276,856, 415,353.36 and 79,864

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Solution

The fourth proportional to 276,856, 415,353.36 and 79,864 is: 119,816.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,856 : 415,353.36 = 79,864 : x
  2. Step 2: Convert to fraction form
    276,856/415,353.36 = 79,864/x
  3. Step 3: Cross multiply
    276,856x = 415,353.36 × 79,864
  4. Step 4: Simplify right side
    276,856x = 33,171,780,743.04
  5. Step 5: Solve for x
    x = 33,171,780,743.04/276,856
  6. Step 6: Final answer
    x = 119,816.01

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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.