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Finding the Fourth Proportional to 53,978.44, 80,968.14 and 18,918.04

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Solution

The fourth proportional to 53,978.44, 80,968.14 and 18,918.04 is: 28,377.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,978.44 : 80,968.14 = 18,918.04 : x
  2. Step 2: Convert to fraction form
    53,978.44/80,968.14 = 18,918.04/x
  3. Step 3: Cross multiply
    53,978.44x = 80,968.14 × 18,918.04
  4. Step 4: Simplify right side
    53,978.44x = 1,531,758,511.25
  5. Step 5: Solve for x
    x = 1,531,758,511.25/53,978.44
  6. Step 6: Final answer
    x = 28,377.23

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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.