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Finding the Fourth Proportional to 68,674.20, 102,809.70 and 51,221.40

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Solution

The fourth proportional to 68,674.20, 102,809.70 and 51,221.40 is: 76,681.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,674.20 : 102,809.70 = 51,221.40 : x
  2. Step 2: Convert to fraction form
    68,674.20/102,809.70 = 51,221.40/x
  3. Step 3: Cross multiply
    68,674.20x = 102,809.70 × 51,221.40
  4. Step 4: Simplify right side
    68,674.20x = 5,266,056,767.58
  5. Step 5: Solve for x
    x = 5,266,056,767.58/68,674.20
  6. Step 6: Final answer
    x = 76,681.73

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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.