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Finding the Fourth Proportional to 80,190.48, 120,121.40 and 45,056.40

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Solution

The fourth proportional to 80,190.48, 120,121.40 and 45,056.40 is: 67,492.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,190.48 : 120,121.40 = 45,056.40 : x
  2. Step 2: Convert to fraction form
    80,190.48/120,121.40 = 45,056.40/x
  3. Step 3: Cross multiply
    80,190.48x = 120,121.40 × 45,056.40
  4. Step 4: Simplify right side
    80,190.48x = 5,412,237,846.96
  5. Step 5: Solve for x
    x = 5,412,237,846.96/80,190.48
  6. Step 6: Final answer
    x = 67,492.27

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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.