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Finding the Fourth Proportional to 218,103,960.42, 300,978,621.45 and 120,318,790.50

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Solution

The fourth proportional to 218,103,960.42, 300,978,621.45 and 120,318,790.50 is: 166,037,258.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,103,960.42 : 300,978,621.45 = 120,318,790.50 : x
  2. Step 2: Convert to fraction form
    218,103,960.42/300,978,621.45 = 120,318,790.50/x
  3. Step 3: Cross multiply
    218,103,960.42x = 300,978,621.45 × 120,318,790.50
  4. Step 4: Simplify right side
    218,103,960.42x = 36,213,383,699,221,352
  5. Step 5: Solve for x
    x = 36,213,383,699,221,352/218,103,960.42
  6. Step 6: Final answer
    x = 166,037,258.70

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