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Finding the Fourth Proportional to 68,388.84, 102,572.97 and 21,635.64

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Solution

The fourth proportional to 68,388.84, 102,572.97 and 21,635.64 is: 32,450.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,388.84 : 102,572.97 = 21,635.64 : x
  2. Step 2: Convert to fraction form
    68,388.84/102,572.97 = 21,635.64/x
  3. Step 3: Cross multiply
    68,388.84x = 102,572.97 × 21,635.64
  4. Step 4: Simplify right side
    68,388.84x = 2,219,231,852.65
  5. Step 5: Solve for x
    x = 2,219,231,852.65/68,388.84
  6. Step 6: Final answer
    x = 32,450.20

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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.