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Finding the Fourth Proportional to 81,269,902.80, 122,103,919.80 and 61,114,510.80

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Solution

The fourth proportional to 81,269,902.80, 122,103,919.80 and 61,114,510.80 is: 91,821,462.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,269,902.80 : 122,103,919.80 = 61,114,510.80 : x
  2. Step 2: Convert to fraction form
    81,269,902.80/122,103,919.80 = 61,114,510.80/x
  3. Step 3: Cross multiply
    81,269,902.80x = 122,103,919.80 × 61,114,510.80
  4. Step 4: Simplify right side
    81,269,902.80x = 7,462,321,325,339,433
  5. Step 5: Solve for x
    x = 7,462,321,325,339,433/81,269,902.80
  6. Step 6: Final answer
    x = 91,821,462.41

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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.