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Finding the Fourth Proportional to 135,998.40, 203,997.60 and 80,702.40

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Solution

The fourth proportional to 135,998.40, 203,997.60 and 80,702.40 is: 121,053.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,998.40 : 203,997.60 = 80,702.40 : x
  2. Step 2: Convert to fraction form
    135,998.40/203,997.60 = 80,702.40/x
  3. Step 3: Cross multiply
    135,998.40x = 203,997.60 × 80,702.40
  4. Step 4: Simplify right side
    135,998.40x = 16,463,095,914.24
  5. Step 5: Solve for x
    x = 16,463,095,914.24/135,998.40
  6. Step 6: Final answer
    x = 121,053.60

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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.