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Finding the Fourth Proportional to 57,383.72, 79,155.79 and 40,412.60

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Solution

The fourth proportional to 57,383.72, 79,155.79 and 40,412.60 is: 55,745.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,383.72 : 79,155.79 = 40,412.60 : x
  2. Step 2: Convert to fraction form
    57,383.72/79,155.79 = 40,412.60/x
  3. Step 3: Cross multiply
    57,383.72x = 79,155.79 × 40,412.60
  4. Step 4: Simplify right side
    57,383.72x = 3,198,890,782.14
  5. Step 5: Solve for x
    x = 3,198,890,782.14/57,383.72
  6. Step 6: Final answer
    x = 55,745.62

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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.