Home / 78,276.33-117,414.09-19,112.31

Finding the Fourth Proportional to 78,276.33, 117,414.09 and 19,112.31

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Solution

The fourth proportional to 78,276.33, 117,414.09 and 19,112.31 is: 28,668.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,276.33 : 117,414.09 = 19,112.31 : x
  2. Step 2: Convert to fraction form
    78,276.33/117,414.09 = 19,112.31/x
  3. Step 3: Cross multiply
    78,276.33x = 117,414.09 × 19,112.31
  4. Step 4: Simplify right side
    78,276.33x = 2,244,054,486.45
  5. Step 5: Solve for x
    x = 2,244,054,486.45/78,276.33
  6. Step 6: Final answer
    x = 28,668.37

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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.