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Finding the Fourth Proportional to 68,978,935.80, 103,380,486.30 and 36,646,327.80

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Solution

The fourth proportional to 68,978,935.80, 103,380,486.30 and 36,646,327.80 is: 54,922,783.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,978,935.80 : 103,380,486.30 = 36,646,327.80 : x
  2. Step 2: Convert to fraction form
    68,978,935.80/103,380,486.30 = 36,646,327.80/x
  3. Step 3: Cross multiply
    68,978,935.80x = 103,380,486.30 × 36,646,327.80
  4. Step 4: Simplify right side
    68,978,935.80x = 3,788,515,189,073,208.50
  5. Step 5: Solve for x
    x = 3,788,515,189,073,208.50/68,978,935.80
  6. Step 6: Final answer
    x = 54,922,783.96

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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.