Home / 81,023,335,491.12-121,523,970,646.34-21,326,998,760.50

Finding the Fourth Proportional to 81,023,335,491.12, 121,523,970,646.34 and 21,326,998,760.50

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Solution

The fourth proportional to 81,023,335,491.12, 121,523,970,646.34 and 21,326,998,760.50 is: 31,987,594,137.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,023,335,491.12 : 121,523,970,646.34 = 21,326,998,760.50 : x
  2. Step 2: Convert to fraction form
    81,023,335,491.12/121,523,970,646.34 = 21,326,998,760.50/x
  3. Step 3: Cross multiply
    81,023,335,491.12x = 121,523,970,646.34 × 21,326,998,760.50
  4. Step 4: Simplify right side
    81,023,335,491.12x = 2,591,741,571,345,531,535,360
  5. Step 5: Solve for x
    x = 2,591,741,571,345,531,535,360/81,023,335,491.12
  6. Step 6: Final answer
    x = 31,987,594,137.37

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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.