Home / 68,219.78-94,145.90-39,540.38

Finding the Fourth Proportional to 68,219.78, 94,145.90 and 39,540.38

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Solution

The fourth proportional to 68,219.78, 94,145.90 and 39,540.38 is: 54,567.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,219.78 : 94,145.90 = 39,540.38 : x
  2. Step 2: Convert to fraction form
    68,219.78/94,145.90 = 39,540.38/x
  3. Step 3: Cross multiply
    68,219.78x = 94,145.90 × 39,540.38
  4. Step 4: Simplify right side
    68,219.78x = 3,722,563,993.01
  5. Step 5: Solve for x
    x = 3,722,563,993.01/68,219.78
  6. Step 6: Final answer
    x = 54,567.23

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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.