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Finding the Fourth Proportional to 68,519.20, 102,730.20 and 31,097.20

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Solution

The fourth proportional to 68,519.20, 102,730.20 and 31,097.20 is: 46,623.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,519.20 : 102,730.20 = 31,097.20 : x
  2. Step 2: Convert to fraction form
    68,519.20/102,730.20 = 31,097.20/x
  3. Step 3: Cross multiply
    68,519.20x = 102,730.20 × 31,097.20
  4. Step 4: Simplify right side
    68,519.20x = 3,194,621,575.44
  5. Step 5: Solve for x
    x = 3,194,621,575.44/68,519.20
  6. Step 6: Final answer
    x = 46,623.74

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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.