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Finding the Fourth Proportional to 76,841.75, 115,262.61 and 20,681.97

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Solution

The fourth proportional to 76,841.75, 115,262.61 and 20,681.97 is: 31,022.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,841.75 : 115,262.61 = 20,681.97 : x
  2. Step 2: Convert to fraction form
    76,841.75/115,262.61 = 20,681.97/x
  3. Step 3: Cross multiply
    76,841.75x = 115,262.61 × 20,681.97
  4. Step 4: Simplify right side
    76,841.75x = 2,383,857,842.14
  5. Step 5: Solve for x
    x = 2,383,857,842.14/76,841.75
  6. Step 6: Final answer
    x = 31,022.95

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1.5x scale

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.