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Finding the Fourth Proportional to 54,128.88, 74,629.88 and 41,397.68

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Solution

The fourth proportional to 54,128.88, 74,629.88 and 41,397.68 is: 57,076.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,128.88 : 74,629.88 = 41,397.68 : x
  2. Step 2: Convert to fraction form
    54,128.88/74,629.88 = 41,397.68/x
  3. Step 3: Cross multiply
    54,128.88x = 74,629.88 × 41,397.68
  4. Step 4: Simplify right side
    54,128.88x = 3,089,503,890.68
  5. Step 5: Solve for x
    x = 3,089,503,890.68/54,128.88
  6. Step 6: Final answer
    x = 57,076.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.