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Finding the Fourth Proportional to 68,520.84, 102,759.39 and 21,762.78

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Solution

The fourth proportional to 68,520.84, 102,759.39 and 21,762.78 is: 32,637.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,520.84 : 102,759.39 = 21,762.78 : x
  2. Step 2: Convert to fraction form
    68,520.84/102,759.39 = 21,762.78/x
  3. Step 3: Cross multiply
    68,520.84x = 102,759.39 × 21,762.78
  4. Step 4: Simplify right side
    68,520.84x = 2,236,329,997.50
  5. Step 5: Solve for x
    x = 2,236,329,997.50/68,520.84
  6. Step 6: Final answer
    x = 32,637.22

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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.