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Finding the Fourth Proportional to 68,857.88, 103,285.44 and 45,314.14

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Solution

The fourth proportional to 68,857.88, 103,285.44 and 45,314.14 is: 67,970.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,857.88 : 103,285.44 = 45,314.14 : x
  2. Step 2: Convert to fraction form
    68,857.88/103,285.44 = 45,314.14/x
  3. Step 3: Cross multiply
    68,857.88x = 103,285.44 × 45,314.14
  4. Step 4: Simplify right side
    68,857.88x = 4,680,290,888.12
  5. Step 5: Solve for x
    x = 4,680,290,888.12/68,857.88
  6. Step 6: Final answer
    x = 67,970.30

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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.