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Finding the Fourth Proportional to 149,149.31, 205,823.90 and 82,081.31

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Solution

The fourth proportional to 149,149.31, 205,823.90 and 82,081.31 is: 113,271.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,149.31 : 205,823.90 = 82,081.31 : x
  2. Step 2: Convert to fraction form
    149,149.31/205,823.90 = 82,081.31/x
  3. Step 3: Cross multiply
    149,149.31x = 205,823.90 × 82,081.31
  4. Step 4: Simplify right side
    149,149.31x = 16,894,294,517.39
  5. Step 5: Solve for x
    x = 16,894,294,517.39/149,149.31
  6. Step 6: Final answer
    x = 113,271.02

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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.