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Finding the Fourth Proportional to 137,893.37, 206,771.94 and 80,981.55

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Solution

The fourth proportional to 137,893.37, 206,771.94 and 80,981.55 is: 121,432.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,893.37 : 206,771.94 = 80,981.55 : x
  2. Step 2: Convert to fraction form
    137,893.37/206,771.94 = 80,981.55/x
  3. Step 3: Cross multiply
    137,893.37x = 206,771.94 × 80,981.55
  4. Step 4: Simplify right side
    137,893.37x = 16,744,712,197.71
  5. Step 5: Solve for x
    x = 16,744,712,197.71/137,893.37
  6. Step 6: Final answer
    x = 121,432.33

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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.