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Finding the Fourth Proportional to 68,823.63, 103,216.73 and 18,891.90

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Solution

The fourth proportional to 68,823.63, 103,216.73 and 18,891.90 is: 28,332.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,823.63 : 103,216.73 = 18,891.90 : x
  2. Step 2: Convert to fraction form
    68,823.63/103,216.73 = 18,891.90/x
  3. Step 3: Cross multiply
    68,823.63x = 103,216.73 × 18,891.90
  4. Step 4: Simplify right side
    68,823.63x = 1,949,960,047.03
  5. Step 5: Solve for x
    x = 1,949,960,047.03/68,823.63
  6. Step 6: Final answer
    x = 28,332.71

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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.