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Finding the Fourth Proportional to 72,933.63, 100,648.50 and 39,399.63

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Solution

The fourth proportional to 72,933.63, 100,648.50 and 39,399.63 is: 54,371.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,933.63 : 100,648.50 = 39,399.63 : x
  2. Step 2: Convert to fraction form
    72,933.63/100,648.50 = 39,399.63/x
  3. Step 3: Cross multiply
    72,933.63x = 100,648.50 × 39,399.63
  4. Step 4: Simplify right side
    72,933.63x = 3,965,513,660.06
  5. Step 5: Solve for x
    x = 3,965,513,660.06/72,933.63
  6. Step 6: Final answer
    x = 54,371.54

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1.5x scale

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.