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Finding the Fourth Proportional to 81,336.74, 122,083.88 and 39,246.41

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Solution

The fourth proportional to 81,336.74, 122,083.88 and 39,246.41 is: 58,907.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,336.74 : 122,083.88 = 39,246.41 : x
  2. Step 2: Convert to fraction form
    81,336.74/122,083.88 = 39,246.41/x
  3. Step 3: Cross multiply
    81,336.74x = 122,083.88 × 39,246.41
  4. Step 4: Simplify right side
    81,336.74x = 4,791,354,117.85
  5. Step 5: Solve for x
    x = 4,791,354,117.85/81,336.74
  6. Step 6: Final answer
    x = 58,907.63

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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.