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Finding the Fourth Proportional to 88,643.89, 122,846.07 and 86,961.72

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Solution

The fourth proportional to 88,643.89, 122,846.07 and 86,961.72 is: 120,514.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,643.89 : 122,846.07 = 86,961.72 : x
  2. Step 2: Convert to fraction form
    88,643.89/122,846.07 = 86,961.72/x
  3. Step 3: Cross multiply
    88,643.89x = 122,846.07 × 86,961.72
  4. Step 4: Simplify right side
    88,643.89x = 10,682,905,542.44
  5. Step 5: Solve for x
    x = 10,682,905,542.44/88,643.89
  6. Step 6: Final answer
    x = 120,514.86

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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.