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Finding the Fourth Proportional to 218,221.80, 327,639.90 and 135,277.80

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Solution

The fourth proportional to 218,221.80, 327,639.90 and 135,277.80 is: 203,107.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,221.80 : 327,639.90 = 135,277.80 : x
  2. Step 2: Convert to fraction form
    218,221.80/327,639.90 = 135,277.80/x
  3. Step 3: Cross multiply
    218,221.80x = 327,639.90 × 135,277.80
  4. Step 4: Simplify right side
    218,221.80x = 44,322,404,864.22
  5. Step 5: Solve for x
    x = 44,322,404,864.22/218,221.80
  6. Step 6: Final answer
    x = 203,107.14

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1.5x scale

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.