Home / 78,150,238.80-117,230,956.92-20,641,936.56

Finding the Fourth Proportional to 78,150,238.80, 117,230,956.92 and 20,641,936.56

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Solution

The fourth proportional to 78,150,238.80, 117,230,956.92 and 20,641,936.56 is: 30,964,383.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,150,238.80 : 117,230,956.92 = 20,641,936.56 : x
  2. Step 2: Convert to fraction form
    78,150,238.80/117,230,956.92 = 20,641,936.56/x
  3. Step 3: Cross multiply
    78,150,238.80x = 117,230,956.92 × 20,641,936.56
  4. Step 4: Simplify right side
    78,150,238.80x = 2,419,873,975,610,733
  5. Step 5: Solve for x
    x = 2,419,873,975,610,733/78,150,238.80
  6. Step 6: Final answer
    x = 30,964,383.64

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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.