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Finding the Fourth Proportional to 81,963.63, 122,809.57 and 28,626.95

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Solution

The fourth proportional to 81,963.63, 122,809.57 and 28,626.95 is: 42,892.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,963.63 : 122,809.57 = 28,626.95 : x
  2. Step 2: Convert to fraction form
    81,963.63/122,809.57 = 28,626.95/x
  3. Step 3: Cross multiply
    81,963.63x = 122,809.57 × 28,626.95
  4. Step 4: Simplify right side
    81,963.63x = 3,515,663,655.37
  5. Step 5: Solve for x
    x = 3,515,663,655.37/81,963.63
  6. Step 6: Final answer
    x = 42,892.97

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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.