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Finding the Fourth Proportional to 68,714.45, 103,034.19 and 20,676.05

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Solution

The fourth proportional to 68,714.45, 103,034.19 and 20,676.05 is: 31,002.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,714.45 : 103,034.19 = 20,676.05 : x
  2. Step 2: Convert to fraction form
    68,714.45/103,034.19 = 20,676.05/x
  3. Step 3: Cross multiply
    68,714.45x = 103,034.19 × 20,676.05
  4. Step 4: Simplify right side
    68,714.45x = 2,130,340,172.20
  5. Step 5: Solve for x
    x = 2,130,340,172.20/68,714.45
  6. Step 6: Final answer
    x = 31,002.80

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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.