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Finding the Fourth Proportional to 68,578.38, 103,040.10 and 43,629.57

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Solution

The fourth proportional to 68,578.38, 103,040.10 and 43,629.57 is: 65,554.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,578.38 : 103,040.10 = 43,629.57 : x
  2. Step 2: Convert to fraction form
    68,578.38/103,040.10 = 43,629.57/x
  3. Step 3: Cross multiply
    68,578.38x = 103,040.10 × 43,629.57
  4. Step 4: Simplify right side
    68,578.38x = 4,495,595,255.76
  5. Step 5: Solve for x
    x = 4,495,595,255.76/68,578.38
  6. Step 6: Final answer
    x = 65,554.12

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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.