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Finding the Fourth Proportional to 68,722.67, 103,100.13 and 21,335.34

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Solution

The fourth proportional to 68,722.67, 103,100.13 and 21,335.34 is: 32,008.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,722.67 : 103,100.13 = 21,335.34 : x
  2. Step 2: Convert to fraction form
    68,722.67/103,100.13 = 21,335.34/x
  3. Step 3: Cross multiply
    68,722.67x = 103,100.13 × 21,335.34
  4. Step 4: Simplify right side
    68,722.67x = 2,199,675,940.97
  5. Step 5: Solve for x
    x = 2,199,675,940.97/68,722.67
  6. Step 6: Final answer
    x = 32,008.01

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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.