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Finding the Fourth Proportional to 121,318,703.60, 181,978,055.40 and 80,504,034.80

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Solution

The fourth proportional to 121,318,703.60, 181,978,055.40 and 80,504,034.80 is: 120,756,052.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,318,703.60 : 181,978,055.40 = 80,504,034.80 : x
  2. Step 2: Convert to fraction form
    121,318,703.60/181,978,055.40 = 80,504,034.80/x
  3. Step 3: Cross multiply
    121,318,703.60x = 181,978,055.40 × 80,504,034.80
  4. Step 4: Simplify right side
    121,318,703.60x = 14,649,967,704,757,928
  5. Step 5: Solve for x
    x = 14,649,967,704,757,928/121,318,703.60
  6. Step 6: Final answer
    x = 120,756,052.20

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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.