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Finding the Fourth Proportional to 276,902.76, 415,354.09 and 66,540.70

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Solution

The fourth proportional to 276,902.76, 415,354.09 and 66,540.70 is: 99,811.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,902.76 : 415,354.09 = 66,540.70 : x
  2. Step 2: Convert to fraction form
    276,902.76/415,354.09 = 66,540.70/x
  3. Step 3: Cross multiply
    276,902.76x = 415,354.09 × 66,540.70
  4. Step 4: Simplify right side
    276,902.76x = 27,637,951,896.46
  5. Step 5: Solve for x
    x = 27,637,951,896.46/276,902.76
  6. Step 6: Final answer
    x = 99,811.04

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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.