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Finding the Fourth Proportional to 68,287.35, 102,443.12 and 20,901.39

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Solution

The fourth proportional to 68,287.35, 102,443.12 and 20,901.39 is: 31,355.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,287.35 : 102,443.12 = 20,901.39 : x
  2. Step 2: Convert to fraction form
    68,287.35/102,443.12 = 20,901.39/x
  3. Step 3: Cross multiply
    68,287.35x = 102,443.12 × 20,901.39
  4. Step 4: Simplify right side
    68,287.35x = 2,141,203,603.94
  5. Step 5: Solve for x
    x = 2,141,203,603.94/68,287.35
  6. Step 6: Final answer
    x = 31,355.79

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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.