Home / 81,972,002.70-122,958,004.05-21,387,728.70

Finding the Fourth Proportional to 81,972,002.70, 122,958,004.05 and 21,387,728.70

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Solution

The fourth proportional to 81,972,002.70, 122,958,004.05 and 21,387,728.70 is: 32,081,593.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,972,002.70 : 122,958,004.05 = 21,387,728.70 : x
  2. Step 2: Convert to fraction form
    81,972,002.70/122,958,004.05 = 21,387,728.70/x
  3. Step 3: Cross multiply
    81,972,002.70x = 122,958,004.05 × 21,387,728.70
  4. Step 4: Simplify right side
    81,972,002.70x = 2,629,792,432,114,901
  5. Step 5: Solve for x
    x = 2,629,792,432,114,901/81,972,002.70
  6. Step 6: Final answer
    x = 32,081,593.05

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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.