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Finding the Fourth Proportional to 206,745.64, 285,292.74 and 117,321.64

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Solution

The fourth proportional to 206,745.64, 285,292.74 and 117,321.64 is: 161,894.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,745.64 : 285,292.74 = 117,321.64 : x
  2. Step 2: Convert to fraction form
    206,745.64/285,292.74 = 117,321.64/x
  3. Step 3: Cross multiply
    206,745.64x = 285,292.74 × 117,321.64
  4. Step 4: Simplify right side
    206,745.64x = 33,471,012,136.89
  5. Step 5: Solve for x
    x = 33,471,012,136.89/206,745.64
  6. Step 6: Final answer
    x = 161,894.65

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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.