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Finding the Fourth Proportional to 68,809.98, 103,214.01 and 18,890.01

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Solution

The fourth proportional to 68,809.98, 103,214.01 and 18,890.01 is: 28,334.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,809.98 : 103,214.01 = 18,890.01 : x
  2. Step 2: Convert to fraction form
    68,809.98/103,214.01 = 18,890.01/x
  3. Step 3: Cross multiply
    68,809.98x = 103,214.01 × 18,890.01
  4. Step 4: Simplify right side
    68,809.98x = 1,949,713,681.04
  5. Step 5: Solve for x
    x = 1,949,713,681.04/68,809.98
  6. Step 6: Final answer
    x = 28,334.75

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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.