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Finding the Fourth Proportional to 80,403.04, 120,608.34 and 66,337

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Solution

The fourth proportional to 80,403.04, 120,608.34 and 66,337 is: 99,508.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,403.04 : 120,608.34 = 66,337 : x
  2. Step 2: Convert to fraction form
    80,403.04/120,608.34 = 66,337/x
  3. Step 3: Cross multiply
    80,403.04x = 120,608.34 × 66,337
  4. Step 4: Simplify right side
    80,403.04x = 8,000,795,450.58
  5. Step 5: Solve for x
    x = 8,000,795,450.58/80,403.04
  6. Step 6: Final answer
    x = 99,508.62

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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.