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Finding the Fourth Proportional to 65,982.56, 91,053.64 and 39,109.12

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Solution

The fourth proportional to 65,982.56, 91,053.64 and 39,109.12 is: 53,969.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,982.56 : 91,053.64 = 39,109.12 : x
  2. Step 2: Convert to fraction form
    65,982.56/91,053.64 = 39,109.12/x
  3. Step 3: Cross multiply
    65,982.56x = 91,053.64 × 39,109.12
  4. Step 4: Simplify right side
    65,982.56x = 3,561,027,733.20
  5. Step 5: Solve for x
    x = 3,561,027,733.20/65,982.56
  6. Step 6: Final answer
    x = 53,969.23

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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.