Home / 81,203,482,999.62-121,805,057,018.83-45,814,773,621.78

Finding the Fourth Proportional to 81,203,482,999.62, 121,805,057,018.83 and 45,814,773,621.78

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Solution

The fourth proportional to 81,203,482,999.62, 121,805,057,018.83 and 45,814,773,621.78 is: 68,722,065,940.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,203,482,999.62 : 121,805,057,018.83 = 45,814,773,621.78 : x
  2. Step 2: Convert to fraction form
    81,203,482,999.62/121,805,057,018.83 = 45,814,773,621.78/x
  3. Step 3: Cross multiply
    81,203,482,999.62x = 121,805,057,018.83 × 45,814,773,621.78
  4. Step 4: Simplify right side
    81,203,482,999.62x = 5,580,471,113,305,701,744,640
  5. Step 5: Solve for x
    x = 5,580,471,113,305,701,744,640/81,203,482,999.62
  6. Step 6: Final answer
    x = 68,722,065,940.59

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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.