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Finding the Fourth Proportional to 133,091.90, 199,539.44 and 80,489.70

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Solution

The fourth proportional to 133,091.90, 199,539.44 and 80,489.70 is: 120,675.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,091.90 : 199,539.44 = 80,489.70 : x
  2. Step 2: Convert to fraction form
    133,091.90/199,539.44 = 80,489.70/x
  3. Step 3: Cross multiply
    133,091.90x = 199,539.44 × 80,489.70
  4. Step 4: Simplify right side
    133,091.90x = 16,060,869,663.77
  5. Step 5: Solve for x
    x = 16,060,869,663.77/133,091.90
  6. Step 6: Final answer
    x = 120,675.03

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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.