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Finding the Fourth Proportional to 276,853, 415,348.86 and 79,861

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Solution

The fourth proportional to 276,853, 415,348.86 and 79,861 is: 119,811.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,853 : 415,348.86 = 79,861 : x
  2. Step 2: Convert to fraction form
    276,853/415,348.86 = 79,861/x
  3. Step 3: Cross multiply
    276,853x = 415,348.86 × 79,861
  4. Step 4: Simplify right side
    276,853x = 33,170,175,308.46
  5. Step 5: Solve for x
    x = 33,170,175,308.46/276,853
  6. Step 6: Final answer
    x = 119,811.51

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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.