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Finding the Fourth Proportional to 73,991,998.80, 110,987,998.20 and 68,953,150.80

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Solution

The fourth proportional to 73,991,998.80, 110,987,998.20 and 68,953,150.80 is: 103,429,726.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,991,998.80 : 110,987,998.20 = 68,953,150.80 : x
  2. Step 2: Convert to fraction form
    73,991,998.80/110,987,998.20 = 68,953,150.80/x
  3. Step 3: Cross multiply
    73,991,998.80x = 110,987,998.20 × 68,953,150.80
  4. Step 4: Simplify right side
    73,991,998.80x = 7,652,972,176,874,728
  5. Step 5: Solve for x
    x = 7,652,972,176,874,728/73,991,998.80
  6. Step 6: Final answer
    x = 103,429,726.20

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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.