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Finding the Fourth Proportional to 68,892.93, 103,339.89 and 18,971.91

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Solution

The fourth proportional to 68,892.93, 103,339.89 and 18,971.91 is: 28,458.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,892.93 : 103,339.89 = 18,971.91 : x
  2. Step 2: Convert to fraction form
    68,892.93/103,339.89 = 18,971.91/x
  3. Step 3: Cross multiply
    68,892.93x = 103,339.89 × 18,971.91
  4. Step 4: Simplify right side
    68,892.93x = 1,960,555,092.49
  5. Step 5: Solve for x
    x = 1,960,555,092.49/68,892.93
  6. Step 6: Final answer
    x = 28,458.00

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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.