Home / 81,197,632.90-121,505,495.86-70,305,388.75

Finding the Fourth Proportional to 81,197,632.90, 121,505,495.86 and 70,305,388.75

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Solution

The fourth proportional to 81,197,632.90, 121,505,495.86 and 70,305,388.75 is: 105,206,159.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,197,632.90 : 121,505,495.86 = 70,305,388.75 : x
  2. Step 2: Convert to fraction form
    81,197,632.90/121,505,495.86 = 70,305,388.75/x
  3. Step 3: Cross multiply
    81,197,632.90x = 121,505,495.86 × 70,305,388.75
  4. Step 4: Simplify right side
    81,197,632.90x = 8,542,491,121,698,816
  5. Step 5: Solve for x
    x = 8,542,491,121,698,816/81,197,632.90
  6. Step 6: Final answer
    x = 105,206,159.55

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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.