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Finding the Fourth Proportional to 81,954.81, 122,980.01 and 34,566.98

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Solution

The fourth proportional to 81,954.81, 122,980.01 and 34,566.98 is: 51,870.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,954.81 : 122,980.01 = 34,566.98 : x
  2. Step 2: Convert to fraction form
    81,954.81/122,980.01 = 34,566.98/x
  3. Step 3: Cross multiply
    81,954.81x = 122,980.01 × 34,566.98
  4. Step 4: Simplify right side
    81,954.81x = 4,251,046,758.33
  5. Step 5: Solve for x
    x = 4,251,046,758.33/81,954.81
  6. Step 6: Final answer
    x = 51,870.62

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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.