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Finding the Fourth Proportional to 68,071.98, 102,108.02 and 21,328.50

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Solution

The fourth proportional to 68,071.98, 102,108.02 and 21,328.50 is: 31,992.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,071.98 : 102,108.02 = 21,328.50 : x
  2. Step 2: Convert to fraction form
    68,071.98/102,108.02 = 21,328.50/x
  3. Step 3: Cross multiply
    68,071.98x = 102,108.02 × 21,328.50
  4. Step 4: Simplify right side
    68,071.98x = 2,177,810,797.93
  5. Step 5: Solve for x
    x = 2,177,810,797.93/68,071.98
  6. Step 6: Final answer
    x = 31,992.76

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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.