Home / 81,972,003.10-122,958,004.65-21,387,729.10

Finding the Fourth Proportional to 81,972,003.10, 122,958,004.65 and 21,387,729.10

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Solution

The fourth proportional to 81,972,003.10, 122,958,004.65 and 21,387,729.10 is: 32,081,593.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,972,003.10 : 122,958,004.65 = 21,387,729.10 : x
  2. Step 2: Convert to fraction form
    81,972,003.10/122,958,004.65 = 21,387,729.10/x
  3. Step 3: Cross multiply
    81,972,003.10x = 122,958,004.65 × 21,387,729.10
  4. Step 4: Simplify right side
    81,972,003.10x = 2,629,792,494,130,740.50
  5. Step 5: Solve for x
    x = 2,629,792,494,130,740.50/81,972,003.10
  6. Step 6: Final answer
    x = 32,081,593.65

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Double scale
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Similar ratio
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1.5x scale

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.