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Finding the Fourth Proportional to 135,940.40, 203,910.60 and 88,701.20

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Solution

The fourth proportional to 135,940.40, 203,910.60 and 88,701.20 is: 133,051.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,940.40 : 203,910.60 = 88,701.20 : x
  2. Step 2: Convert to fraction form
    135,940.40/203,910.60 = 88,701.20/x
  3. Step 3: Cross multiply
    135,940.40x = 203,910.60 × 88,701.20
  4. Step 4: Simplify right side
    135,940.40x = 18,087,114,912.72
  5. Step 5: Solve for x
    x = 18,087,114,912.72/135,940.40
  6. Step 6: Final answer
    x = 133,051.80

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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.