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Finding the Fourth Proportional to 68,693.40, 102,821.40 and 49,010.40

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Solution

The fourth proportional to 68,693.40, 102,821.40 and 49,010.40 is: 73,359.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,693.40 : 102,821.40 = 49,010.40 : x
  2. Step 2: Convert to fraction form
    68,693.40/102,821.40 = 49,010.40/x
  3. Step 3: Cross multiply
    68,693.40x = 102,821.40 × 49,010.40
  4. Step 4: Simplify right side
    68,693.40x = 5,039,317,942.56
  5. Step 5: Solve for x
    x = 5,039,317,942.56/68,693.40
  6. Step 6: Final answer
    x = 73,359.57

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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.