Home / 139,028.69-208,559.45-104,189.78

Finding the Fourth Proportional to 139,028.69, 208,559.45 and 104,189.78

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Solution

The fourth proportional to 139,028.69, 208,559.45 and 104,189.78 is: 156,296.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,028.69 : 208,559.45 = 104,189.78 : x
  2. Step 2: Convert to fraction form
    139,028.69/208,559.45 = 104,189.78/x
  3. Step 3: Cross multiply
    139,028.69x = 208,559.45 × 104,189.78
  4. Step 4: Simplify right side
    139,028.69x = 21,729,763,212.87
  5. Step 5: Solve for x
    x = 21,729,763,212.87/139,028.69
  6. Step 6: Final answer
    x = 156,296.97

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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.