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Finding the Fourth Proportional to 79,268, 109,389.84 and 47,441.48

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Solution

The fourth proportional to 79,268, 109,389.84 and 47,441.48 is: 65,469.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,268 : 109,389.84 = 47,441.48 : x
  2. Step 2: Convert to fraction form
    79,268/109,389.84 = 47,441.48/x
  3. Step 3: Cross multiply
    79,268x = 109,389.84 × 47,441.48
  4. Step 4: Simplify right side
    79,268x = 5,189,615,906.56
  5. Step 5: Solve for x
    x = 5,189,615,906.56/79,268
  6. Step 6: Final answer
    x = 65,469.24

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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.