Home / 81,128,083.56-111,956,571.54-43,959,378.12

Finding the Fourth Proportional to 81,128,083.56, 111,956,571.54 and 43,959,378.12

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Solution

The fourth proportional to 81,128,083.56, 111,956,571.54 and 43,959,378.12 is: 60,663,842.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,128,083.56 : 111,956,571.54 = 43,959,378.12 : x
  2. Step 2: Convert to fraction form
    81,128,083.56/111,956,571.54 = 43,959,378.12/x
  3. Step 3: Cross multiply
    81,128,083.56x = 111,956,571.54 × 43,959,378.12
  4. Step 4: Simplify right side
    81,128,083.56x = 4,921,541,261,345,691
  5. Step 5: Solve for x
    x = 4,921,541,261,345,691/81,128,083.56
  6. Step 6: Final answer
    x = 60,663,842.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.