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Finding the Fourth Proportional to 68,660.29, 103,005.12 and 21,274.33

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Solution

The fourth proportional to 68,660.29, 103,005.12 and 21,274.33 is: 31,916.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,660.29 : 103,005.12 = 21,274.33 : x
  2. Step 2: Convert to fraction form
    68,660.29/103,005.12 = 21,274.33/x
  3. Step 3: Cross multiply
    68,660.29x = 103,005.12 × 21,274.33
  4. Step 4: Simplify right side
    68,660.29x = 2,191,364,399.54
  5. Step 5: Solve for x
    x = 2,191,364,399.54/68,660.29
  6. Step 6: Final answer
    x = 31,916.04

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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.