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Finding the Fourth Proportional to 121,327,581.60, 181,991,372.40 and 80,512,912.80

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Solution

The fourth proportional to 121,327,581.60, 181,991,372.40 and 80,512,912.80 is: 120,769,369.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,327,581.60 : 181,991,372.40 = 80,512,912.80 : x
  2. Step 2: Convert to fraction form
    121,327,581.60/181,991,372.40 = 80,512,912.80/x
  3. Step 3: Cross multiply
    121,327,581.60x = 181,991,372.40 × 80,512,912.80
  4. Step 4: Simplify right side
    121,327,581.60x = 14,652,655,496,393,526
  5. Step 5: Solve for x
    x = 14,652,655,496,393,526/121,327,581.60
  6. Step 6: Final answer
    x = 120,769,369.20

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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.