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Finding the Fourth Proportional to 133,091.88, 199,539.40 and 80,489.67

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Solution

The fourth proportional to 133,091.88, 199,539.40 and 80,489.67 is: 120,674.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,091.88 : 199,539.40 = 80,489.67 : x
  2. Step 2: Convert to fraction form
    133,091.88/199,539.40 = 80,489.67/x
  3. Step 3: Cross multiply
    133,091.88x = 199,539.40 × 80,489.67
  4. Step 4: Simplify right side
    133,091.88x = 16,060,860,458.00
  5. Step 5: Solve for x
    x = 16,060,860,458.00/133,091.88
  6. Step 6: Final answer
    x = 120,674.98

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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.