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Finding the Fourth Proportional to 133,087.91, 199,533.45 and 80,485.70

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Solution

The fourth proportional to 133,087.91, 199,533.45 and 80,485.70 is: 120,669.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,087.91 : 199,533.45 = 80,485.70 : x
  2. Step 2: Convert to fraction form
    133,087.91/199,533.45 = 80,485.70/x
  3. Step 3: Cross multiply
    133,087.91x = 199,533.45 × 80,485.70
  4. Step 4: Simplify right side
    133,087.91x = 16,059,587,996.57
  5. Step 5: Solve for x
    x = 16,059,587,996.57/133,087.91
  6. Step 6: Final answer
    x = 120,669.03

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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.