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Finding the Fourth Proportional to 80,740.65, 120,814.76 and 67,380.67

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Solution

The fourth proportional to 80,740.65, 120,814.76 and 67,380.67 is: 100,823.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,740.65 : 120,814.76 = 67,380.67 : x
  2. Step 2: Convert to fraction form
    80,740.65/120,814.76 = 67,380.67/x
  3. Step 3: Cross multiply
    80,740.65x = 120,814.76 × 67,380.67
  4. Step 4: Simplify right side
    80,740.65x = 8,140,579,474.69
  5. Step 5: Solve for x
    x = 8,140,579,474.69/80,740.65
  6. Step 6: Final answer
    x = 100,823.80

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1.5x scale

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.