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Finding the Fourth Proportional to 68,028.92, 102,045.30 and 18,780.92

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Solution

The fourth proportional to 68,028.92, 102,045.30 and 18,780.92 is: 28,171.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,028.92 : 102,045.30 = 18,780.92 : x
  2. Step 2: Convert to fraction form
    68,028.92/102,045.30 = 18,780.92/x
  3. Step 3: Cross multiply
    68,028.92x = 102,045.30 × 18,780.92
  4. Step 4: Simplify right side
    68,028.92x = 1,916,504,615.68
  5. Step 5: Solve for x
    x = 1,916,504,615.68/68,028.92
  6. Step 6: Final answer
    x = 28,171.91

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1.5x scale

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.