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Finding the Fourth Proportional to 68,713.96, 103,085.64 and 21,328.02

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Solution

The fourth proportional to 68,713.96, 103,085.64 and 21,328.02 is: 31,996.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,713.96 : 103,085.64 = 21,328.02 : x
  2. Step 2: Convert to fraction form
    68,713.96/103,085.64 = 21,328.02/x
  3. Step 3: Cross multiply
    68,713.96x = 103,085.64 × 21,328.02
  4. Step 4: Simplify right side
    68,713.96x = 2,198,612,591.63
  5. Step 5: Solve for x
    x = 2,198,612,591.63/68,713.96
  6. Step 6: Final answer
    x = 31,996.59

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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.