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Finding the Fourth Proportional to 81,459.47, 122,112.59 and 43,963.36

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Solution

The fourth proportional to 81,459.47, 122,112.59 and 43,963.36 is: 65,903.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,459.47 : 122,112.59 = 43,963.36 : x
  2. Step 2: Convert to fraction form
    81,459.47/122,112.59 = 43,963.36/x
  3. Step 3: Cross multiply
    81,459.47x = 122,112.59 × 43,963.36
  4. Step 4: Simplify right side
    81,459.47x = 5,368,479,144.14
  5. Step 5: Solve for x
    x = 5,368,479,144.14/81,459.47
  6. Step 6: Final answer
    x = 65,903.68

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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.