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Finding the Fourth Proportional to 68,521.84, 102,793.83 and 21,125.83

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Solution

The fourth proportional to 68,521.84, 102,793.83 and 21,125.83 is: 31,692.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,521.84 : 102,793.83 = 21,125.83 : x
  2. Step 2: Convert to fraction form
    68,521.84/102,793.83 = 21,125.83/x
  3. Step 3: Cross multiply
    68,521.84x = 102,793.83 × 21,125.83
  4. Step 4: Simplify right side
    68,521.84x = 2,171,605,234.61
  5. Step 5: Solve for x
    x = 2,171,605,234.61/68,521.84
  6. Step 6: Final answer
    x = 31,692.16

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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.