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Finding the Fourth Proportional to 64,629.63, 96,945.66 and 20,255.40

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Solution

The fourth proportional to 64,629.63, 96,945.66 and 20,255.40 is: 30,383.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,629.63 : 96,945.66 = 20,255.40 : x
  2. Step 2: Convert to fraction form
    64,629.63/96,945.66 = 20,255.40/x
  3. Step 3: Cross multiply
    64,629.63x = 96,945.66 × 20,255.40
  4. Step 4: Simplify right side
    64,629.63x = 1,963,673,121.56
  5. Step 5: Solve for x
    x = 1,963,673,121.56/64,629.63
  6. Step 6: Final answer
    x = 30,383.48

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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.