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Finding the Fourth Proportional to 73,020.95, 100,768.92 and 39,486.95

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Solution

The fourth proportional to 73,020.95, 100,768.92 and 39,486.95 is: 54,492.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,020.95 : 100,768.92 = 39,486.95 : x
  2. Step 2: Convert to fraction form
    73,020.95/100,768.92 = 39,486.95/x
  3. Step 3: Cross multiply
    73,020.95x = 100,768.92 × 39,486.95
  4. Step 4: Simplify right side
    73,020.95x = 3,979,057,305.59
  5. Step 5: Solve for x
    x = 3,979,057,305.59/73,020.95
  6. Step 6: Final answer
    x = 54,492.00

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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.