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Finding the Fourth Proportional to 72,291,340.40, 108,520,991.40 and 43,569,906.80

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Solution

The fourth proportional to 72,291,340.40, 108,520,991.40 and 43,569,906.80 is: 65,405,475.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,291,340.40 : 108,520,991.40 = 43,569,906.80 : x
  2. Step 2: Convert to fraction form
    72,291,340.40/108,520,991.40 = 43,569,906.80/x
  3. Step 3: Cross multiply
    72,291,340.40x = 108,520,991.40 × 43,569,906.80
  4. Step 4: Simplify right side
    72,291,340.40x = 4,728,249,481,141,601
  5. Step 5: Solve for x
    x = 4,728,249,481,141,601/72,291,340.40
  6. Step 6: Final answer
    x = 65,405,475.33

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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.