Home / 81,983.58-113,189.57-66,912.19

Finding the Fourth Proportional to 81,983.58, 113,189.57 and 66,912.19

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Solution

The fourth proportional to 81,983.58, 113,189.57 and 66,912.19 is: 92,381.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,983.58 : 113,189.57 = 66,912.19 : x
  2. Step 2: Convert to fraction form
    81,983.58/113,189.57 = 66,912.19/x
  3. Step 3: Cross multiply
    81,983.58x = 113,189.57 × 66,912.19
  4. Step 4: Simplify right side
    81,983.58x = 7,573,762,283.94
  5. Step 5: Solve for x
    x = 7,573,762,283.94/81,983.58
  6. Step 6: Final answer
    x = 92,381.46

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1.5x scale

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.