Home / 71,987,923.60-107,981,885.40-66,445,190.80

Finding the Fourth Proportional to 71,987,923.60, 107,981,885.40 and 66,445,190.80

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Solution

The fourth proportional to 71,987,923.60, 107,981,885.40 and 66,445,190.80 is: 99,667,786.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,987,923.60 : 107,981,885.40 = 66,445,190.80 : x
  2. Step 2: Convert to fraction form
    71,987,923.60/107,981,885.40 = 66,445,190.80/x
  3. Step 3: Cross multiply
    71,987,923.60x = 107,981,885.40 × 66,445,190.80
  4. Step 4: Simplify right side
    71,987,923.60x = 7,174,876,978,346,734
  5. Step 5: Solve for x
    x = 7,174,876,978,346,734/71,987,923.60
  6. Step 6: Final answer
    x = 99,667,786.20

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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.