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Finding the Fourth Proportional to 80,161.88, 120,127.80 and 45,027.60

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Solution

The fourth proportional to 80,161.88, 120,127.80 and 45,027.60 is: 67,476.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,161.88 : 120,127.80 = 45,027.60 : x
  2. Step 2: Convert to fraction form
    80,161.88/120,127.80 = 45,027.60/x
  3. Step 3: Cross multiply
    80,161.88x = 120,127.80 × 45,027.60
  4. Step 4: Simplify right side
    80,161.88x = 5,409,066,527.28
  5. Step 5: Solve for x
    x = 5,409,066,527.28/80,161.88
  6. Step 6: Final answer
    x = 67,476.79

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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.