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Finding the Fourth Proportional to 69,012,388.80, 103,430,665.80 and 36,679,780.80

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Solution

The fourth proportional to 69,012,388.80, 103,430,665.80 and 36,679,780.80 is: 54,972,943.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,012,388.80 : 103,430,665.80 = 36,679,780.80 : x
  2. Step 2: Convert to fraction form
    69,012,388.80/103,430,665.80 = 36,679,780.80/x
  3. Step 3: Cross multiply
    69,012,388.80x = 103,430,665.80 × 36,679,780.80
  4. Step 4: Simplify right side
    69,012,388.80x = 3,793,814,149,542,056
  5. Step 5: Solve for x
    x = 3,793,814,149,542,056/69,012,388.80
  6. Step 6: Final answer
    x = 54,972,943.49

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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.