Home / 81,919,138.20-122,796,038.70-40,915,512.60

Finding the Fourth Proportional to 81,919,138.20, 122,796,038.70 and 40,915,512.60

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Solution

The fourth proportional to 81,919,138.20, 122,796,038.70 and 40,915,512.60 is: 61,331,979.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,919,138.20 : 122,796,038.70 = 40,915,512.60 : x
  2. Step 2: Convert to fraction form
    81,919,138.20/122,796,038.70 = 40,915,512.60/x
  3. Step 3: Cross multiply
    81,919,138.20x = 122,796,038.70 × 40,915,512.60
  4. Step 4: Simplify right side
    81,919,138.20x = 5,024,262,868,659,938
  5. Step 5: Solve for x
    x = 5,024,262,868,659,938/81,919,138.20
  6. Step 6: Final answer
    x = 61,331,979.06

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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.