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Finding the Fourth Proportional to 27,068,932.80, 40,603,399.20 and 20,691,640.80

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Solution

The fourth proportional to 27,068,932.80, 40,603,399.20 and 20,691,640.80 is: 31,037,461.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,068,932.80 : 40,603,399.20 = 20,691,640.80 : x
  2. Step 2: Convert to fraction form
    27,068,932.80/40,603,399.20 = 20,691,640.80/x
  3. Step 3: Cross multiply
    27,068,932.80x = 40,603,399.20 × 20,691,640.80
  4. Step 4: Simplify right side
    27,068,932.80x = 840,150,951,505,407.50
  5. Step 5: Solve for x
    x = 840,150,951,505,407.50/27,068,932.80
  6. Step 6: Final answer
    x = 31,037,461.20

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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.