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Finding the Fourth Proportional to 137,102.60, 205,653.90 and 81,806.60

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Solution

The fourth proportional to 137,102.60, 205,653.90 and 81,806.60 is: 122,709.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,102.60 : 205,653.90 = 81,806.60 : x
  2. Step 2: Convert to fraction form
    137,102.60/205,653.90 = 81,806.60/x
  3. Step 3: Cross multiply
    137,102.60x = 205,653.90 × 81,806.60
  4. Step 4: Simplify right side
    137,102.60x = 16,823,846,335.74
  5. Step 5: Solve for x
    x = 16,823,846,335.74/137,102.60
  6. Step 6: Final answer
    x = 122,709.90

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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.