Home / 142,435,769.68-196,557,140.32-78,858,942.18

Finding the Fourth Proportional to 142,435,769.68, 196,557,140.32 and 78,858,942.18

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Solution

The fourth proportional to 142,435,769.68, 196,557,140.32 and 78,858,942.18 is: 108,823,002.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,435,769.68 : 196,557,140.32 = 78,858,942.18 : x
  2. Step 2: Convert to fraction form
    142,435,769.68/196,557,140.32 = 78,858,942.18/x
  3. Step 3: Cross multiply
    142,435,769.68x = 196,557,140.32 × 78,858,942.18
  4. Step 4: Simplify right side
    142,435,769.68x = 15,500,288,163,561,028
  5. Step 5: Solve for x
    x = 15,500,288,163,561,028/142,435,769.68
  6. Step 6: Final answer
    x = 108,823,002.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.