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Finding the Fourth Proportional to 68,218.80, 94,093.80 and 39,930.12

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Solution

The fourth proportional to 68,218.80, 94,093.80 and 39,930.12 is: 55,075.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,218.80 : 94,093.80 = 39,930.12 : x
  2. Step 2: Convert to fraction form
    68,218.80/94,093.80 = 39,930.12/x
  3. Step 3: Cross multiply
    68,218.80x = 94,093.80 × 39,930.12
  4. Step 4: Simplify right side
    68,218.80x = 3,757,176,725.26
  5. Step 5: Solve for x
    x = 3,757,176,725.26/68,218.80
  6. Step 6: Final answer
    x = 55,075.39

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1.5x scale

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.