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Finding the Fourth Proportional to 79,993, 119,995.42 and 30,745

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Solution

The fourth proportional to 79,993, 119,995.42 and 30,745 is: 46,119.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,993 : 119,995.42 = 30,745 : x
  2. Step 2: Convert to fraction form
    79,993/119,995.42 = 30,745/x
  3. Step 3: Cross multiply
    79,993x = 119,995.42 × 30,745
  4. Step 4: Simplify right side
    79,993x = 3,689,259,187.90
  5. Step 5: Solve for x
    x = 3,689,259,187.90/79,993
  6. Step 6: Final answer
    x = 46,119.78

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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.