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Finding the Fourth Proportional to 80,369.96, 120,438.30 and 45,234.60

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Solution

The fourth proportional to 80,369.96, 120,438.30 and 45,234.60 is: 67,786.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,369.96 : 120,438.30 = 45,234.60 : x
  2. Step 2: Convert to fraction form
    80,369.96/120,438.30 = 45,234.60/x
  3. Step 3: Cross multiply
    80,369.96x = 120,438.30 × 45,234.60
  4. Step 4: Simplify right side
    80,369.96x = 5,447,978,325.18
  5. Step 5: Solve for x
    x = 5,447,978,325.18/80,369.96
  6. Step 6: Final answer
    x = 67,786.25

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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.