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Finding the Fourth Proportional to 218,220.80, 327,638.40 and 135,276.80

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Solution

The fourth proportional to 218,220.80, 327,638.40 and 135,276.80 is: 203,105.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,220.80 : 327,638.40 = 135,276.80 : x
  2. Step 2: Convert to fraction form
    218,220.80/327,638.40 = 135,276.80/x
  3. Step 3: Cross multiply
    218,220.80x = 327,638.40 × 135,276.80
  4. Step 4: Simplify right side
    218,220.80x = 44,321,874,309.12
  5. Step 5: Solve for x
    x = 44,321,874,309.12/218,220.80
  6. Step 6: Final answer
    x = 203,105.64

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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.