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Finding the Fourth Proportional to 80,404.04, 120,609.84 and 66,338

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Solution

The fourth proportional to 80,404.04, 120,609.84 and 66,338 is: 99,510.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,404.04 : 120,609.84 = 66,338 : x
  2. Step 2: Convert to fraction form
    80,404.04/120,609.84 = 66,338/x
  3. Step 3: Cross multiply
    80,404.04x = 120,609.84 × 66,338
  4. Step 4: Simplify right side
    80,404.04x = 8,001,015,565.92
  5. Step 5: Solve for x
    x = 8,001,015,565.92/80,404.04
  6. Step 6: Final answer
    x = 99,510.12

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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.