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Finding the Fourth Proportional to 68,480.20, 102,712.20 and 18,557.20

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Solution

The fourth proportional to 68,480.20, 102,712.20 and 18,557.20 is: 27,833.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,480.20 : 102,712.20 = 18,557.20 : x
  2. Step 2: Convert to fraction form
    68,480.20/102,712.20 = 18,557.20/x
  3. Step 3: Cross multiply
    68,480.20x = 102,712.20 × 18,557.20
  4. Step 4: Simplify right side
    68,480.20x = 1,906,050,837.84
  5. Step 5: Solve for x
    x = 1,906,050,837.84/68,480.20
  6. Step 6: Final answer
    x = 27,833.61

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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.