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Finding the Fourth Proportional to 68,665.96, 102,959.22 and 21,268.39

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Solution

The fourth proportional to 68,665.96, 102,959.22 and 21,268.39 is: 31,890.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,665.96 : 102,959.22 = 21,268.39 : x
  2. Step 2: Convert to fraction form
    68,665.96/102,959.22 = 21,268.39/x
  3. Step 3: Cross multiply
    68,665.96x = 102,959.22 × 21,268.39
  4. Step 4: Simplify right side
    68,665.96x = 2,189,776,845.06
  5. Step 5: Solve for x
    x = 2,189,776,845.06/68,665.96
  6. Step 6: Final answer
    x = 31,890.28

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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.