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Finding the Fourth Proportional to 76,809.44, 106,042.43 and 68,287.97

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Solution

The fourth proportional to 76,809.44, 106,042.43 and 68,287.97 is: 94,277.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,809.44 : 106,042.43 = 68,287.97 : x
  2. Step 2: Convert to fraction form
    76,809.44/106,042.43 = 68,287.97/x
  3. Step 3: Cross multiply
    76,809.44x = 106,042.43 × 68,287.97
  4. Step 4: Simplify right side
    76,809.44x = 7,241,421,406.92
  5. Step 5: Solve for x
    x = 7,241,421,406.92/76,809.44
  6. Step 6: Final answer
    x = 94,277.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.