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Finding the Fourth Proportional to 68,539.82, 102,808.65 and 21,792.02

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Solution

The fourth proportional to 68,539.82, 102,808.65 and 21,792.02 is: 32,687.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,539.82 : 102,808.65 = 21,792.02 : x
  2. Step 2: Convert to fraction form
    68,539.82/102,808.65 = 21,792.02/x
  3. Step 3: Cross multiply
    68,539.82x = 102,808.65 × 21,792.02
  4. Step 4: Simplify right side
    68,539.82x = 2,240,408,156.97
  5. Step 5: Solve for x
    x = 2,240,408,156.97/68,539.82
  6. Step 6: Final answer
    x = 32,687.69

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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.