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Finding the Fourth Proportional to 82,019,858.20, 123,029,787.30 and 43,661,627.80

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Solution

The fourth proportional to 82,019,858.20, 123,029,787.30 and 43,661,627.80 is: 65,492,441.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,019,858.20 : 123,029,787.30 = 43,661,627.80 : x
  2. Step 2: Convert to fraction form
    82,019,858.20/123,029,787.30 = 43,661,627.80/x
  3. Step 3: Cross multiply
    82,019,858.20x = 123,029,787.30 × 43,661,627.80
  4. Step 4: Simplify right side
    82,019,858.20x = 5,371,680,781,405,766
  5. Step 5: Solve for x
    x = 5,371,680,781,405,766/82,019,858.20
  6. Step 6: Final answer
    x = 65,492,441.70

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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.