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Finding the Fourth Proportional to 72,183,771.80, 108,275,657.70 and 67,081,938.20

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Solution

The fourth proportional to 72,183,771.80, 108,275,657.70 and 67,081,938.20 is: 100,622,907.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,183,771.80 : 108,275,657.70 = 67,081,938.20 : x
  2. Step 2: Convert to fraction form
    72,183,771.80/108,275,657.70 = 67,081,938.20/x
  3. Step 3: Cross multiply
    72,183,771.80x = 108,275,657.70 × 67,081,938.20
  4. Step 4: Simplify right side
    72,183,771.80x = 7,263,340,978,395,755
  5. Step 5: Solve for x
    x = 7,263,340,978,395,755/72,183,771.80
  6. Step 6: Final answer
    x = 100,622,907.30

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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.