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Finding the Fourth Proportional to 68,851.80, 103,083.30 and 66,907.80

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Solution

The fourth proportional to 68,851.80, 103,083.30 and 66,907.80 is: 100,172.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,851.80 : 103,083.30 = 66,907.80 : x
  2. Step 2: Convert to fraction form
    68,851.80/103,083.30 = 66,907.80/x
  3. Step 3: Cross multiply
    68,851.80x = 103,083.30 × 66,907.80
  4. Step 4: Simplify right side
    68,851.80x = 6,897,076,819.74
  5. Step 5: Solve for x
    x = 6,897,076,819.74/68,851.80
  6. Step 6: Final answer
    x = 100,172.79

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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.