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Finding the Fourth Proportional to 319,804.44, 479,619.09 and 120,109.38

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Solution

The fourth proportional to 319,804.44, 479,619.09 and 120,109.38 is: 180,131.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,804.44 : 479,619.09 = 120,109.38 : x
  2. Step 2: Convert to fraction form
    319,804.44/479,619.09 = 120,109.38/x
  3. Step 3: Cross multiply
    319,804.44x = 479,619.09 × 120,109.38
  4. Step 4: Simplify right side
    319,804.44x = 57,606,751,536.06
  5. Step 5: Solve for x
    x = 57,606,751,536.06/319,804.44
  6. Step 6: Final answer
    x = 180,131.18

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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.