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Finding the Fourth Proportional to 68,608.95, 102,910.34 and 28,611.47

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Solution

The fourth proportional to 68,608.95, 102,910.34 and 28,611.47 is: 42,915.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,608.95 : 102,910.34 = 28,611.47 : x
  2. Step 2: Convert to fraction form
    68,608.95/102,910.34 = 28,611.47/x
  3. Step 3: Cross multiply
    68,608.95x = 102,910.34 × 28,611.47
  4. Step 4: Simplify right side
    68,608.95x = 2,944,415,447.99
  5. Step 5: Solve for x
    x = 2,944,415,447.99/68,608.95
  6. Step 6: Final answer
    x = 42,915.91

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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.