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Finding the Fourth Proportional to 69,578.72, 96,684.72 and 68,856.20

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Solution

The fourth proportional to 69,578.72, 96,684.72 and 68,856.20 is: 95,680.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,578.72 : 96,684.72 = 68,856.20 : x
  2. Step 2: Convert to fraction form
    69,578.72/96,684.72 = 68,856.20/x
  3. Step 3: Cross multiply
    69,578.72x = 96,684.72 × 68,856.20
  4. Step 4: Simplify right side
    69,578.72x = 6,657,342,417.26
  5. Step 5: Solve for x
    x = 6,657,342,417.26/69,578.72
  6. Step 6: Final answer
    x = 95,680.73

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.