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Finding the Fourth Proportional to 68,811.98, 103,218.12 and 18,892.76

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Solution

The fourth proportional to 68,811.98, 103,218.12 and 18,892.76 is: 28,339.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,811.98 : 103,218.12 = 18,892.76 : x
  2. Step 2: Convert to fraction form
    68,811.98/103,218.12 = 18,892.76/x
  3. Step 3: Cross multiply
    68,811.98x = 103,218.12 × 18,892.76
  4. Step 4: Simplify right side
    68,811.98x = 1,950,075,168.81
  5. Step 5: Solve for x
    x = 1,950,075,168.81/68,811.98
  6. Step 6: Final answer
    x = 28,339.18

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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.