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Finding the Fourth Proportional to 74,728.88, 103,154.64 and 54,744.48

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Solution

The fourth proportional to 74,728.88, 103,154.64 and 54,744.48 is: 75,568.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,728.88 : 103,154.64 = 54,744.48 : x
  2. Step 2: Convert to fraction form
    74,728.88/103,154.64 = 54,744.48/x
  3. Step 3: Cross multiply
    74,728.88x = 103,154.64 × 54,744.48
  4. Step 4: Simplify right side
    74,728.88x = 5,647,147,365.19
  5. Step 5: Solve for x
    x = 5,647,147,365.19/74,728.88
  6. Step 6: Final answer
    x = 75,568.47

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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.