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Finding the Fourth Proportional to 68,812.23, 103,218.50 and 18,893.01

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Solution

The fourth proportional to 68,812.23, 103,218.50 and 18,893.01 is: 28,339.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,812.23 : 103,218.50 = 18,893.01 : x
  2. Step 2: Convert to fraction form
    68,812.23/103,218.50 = 18,893.01/x
  3. Step 3: Cross multiply
    68,812.23x = 103,218.50 × 18,893.01
  4. Step 4: Simplify right side
    68,812.23x = 1,950,108,152.69
  5. Step 5: Solve for x
    x = 1,950,108,152.69/68,812.23
  6. Step 6: Final answer
    x = 28,339.56

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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.