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Finding the Fourth Proportional to 68,511.80, 94,558.31 and 39,840.33

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Solution

The fourth proportional to 68,511.80, 94,558.31 and 39,840.33 is: 54,986.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,511.80 : 94,558.31 = 39,840.33 : x
  2. Step 2: Convert to fraction form
    68,511.80/94,558.31 = 39,840.33/x
  3. Step 3: Cross multiply
    68,511.80x = 94,558.31 × 39,840.33
  4. Step 4: Simplify right side
    68,511.80x = 3,767,234,075.44
  5. Step 5: Solve for x
    x = 3,767,234,075.44/68,511.80
  6. Step 6: Final answer
    x = 54,986.65

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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.