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Finding the Fourth Proportional to 68,091.36, 102,137.03 and 21,347.88

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Solution

The fourth proportional to 68,091.36, 102,137.03 and 21,347.88 is: 32,021.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,091.36 : 102,137.03 = 21,347.88 : x
  2. Step 2: Convert to fraction form
    68,091.36/102,137.03 = 21,347.88/x
  3. Step 3: Cross multiply
    68,091.36x = 102,137.03 × 21,347.88
  4. Step 4: Simplify right side
    68,091.36x = 2,180,409,060.00
  5. Step 5: Solve for x
    x = 2,180,409,060.00/68,091.36
  6. Step 6: Final answer
    x = 32,021.82

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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.