Home / 77,067.49-115,603.61-20,907.38

Finding the Fourth Proportional to 77,067.49, 115,603.61 and 20,907.38

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Solution

The fourth proportional to 77,067.49, 115,603.61 and 20,907.38 is: 31,361.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,067.49 : 115,603.61 = 20,907.38 : x
  2. Step 2: Convert to fraction form
    77,067.49/115,603.61 = 20,907.38/x
  3. Step 3: Cross multiply
    77,067.49x = 115,603.61 × 20,907.38
  4. Step 4: Simplify right side
    77,067.49x = 2,416,967,921.09
  5. Step 5: Solve for x
    x = 2,416,967,921.09/77,067.49
  6. Step 6: Final answer
    x = 31,361.71

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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.