Home / 387,694,539-581,546,872.62-128,909,759.58

Finding the Fourth Proportional to 387,694,539, 581,546,872.62 and 128,909,759.58

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Solution

The fourth proportional to 387,694,539, 581,546,872.62 and 128,909,759.58 is: 193,366,323.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,694,539 : 581,546,872.62 = 128,909,759.58 : x
  2. Step 2: Convert to fraction form
    387,694,539/581,546,872.62 = 128,909,759.58/x
  3. Step 3: Cross multiply
    387,694,539x = 581,546,872.62 × 128,909,759.58
  4. Step 4: Simplify right side
    387,694,539x = 74,967,067,533,945,088
  5. Step 5: Solve for x
    x = 74,967,067,533,945,088/387,694,539
  6. Step 6: Final answer
    x = 193,366,323.21

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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.