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Finding the Fourth Proportional to 68,645.64, 102,983.82 and 21,901.32

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Solution

The fourth proportional to 68,645.64, 102,983.82 and 21,901.32 is: 32,856.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,645.64 : 102,983.82 = 21,901.32 : x
  2. Step 2: Convert to fraction form
    68,645.64/102,983.82 = 21,901.32/x
  3. Step 3: Cross multiply
    68,645.64x = 102,983.82 × 21,901.32
  4. Step 4: Simplify right side
    68,645.64x = 2,255,481,596.64
  5. Step 5: Solve for x
    x = 2,255,481,596.64/68,645.64
  6. Step 6: Final answer
    x = 32,856.88

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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.