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Finding the Fourth Proportional to 268,986.80, 403,537.80 and 82,017.20

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Solution

The fourth proportional to 268,986.80, 403,537.80 and 82,017.20 is: 123,043.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,986.80 : 403,537.80 = 82,017.20 : x
  2. Step 2: Convert to fraction form
    268,986.80/403,537.80 = 82,017.20/x
  3. Step 3: Cross multiply
    268,986.80x = 403,537.80 × 82,017.20
  4. Step 4: Simplify right side
    268,986.80x = 33,097,040,450.16
  5. Step 5: Solve for x
    x = 33,097,040,450.16/268,986.80
  6. Step 6: Final answer
    x = 123,043.36

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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.