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Finding the Fourth Proportional to 65,999.89, 91,080.16 and 35,785.12

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Solution

The fourth proportional to 65,999.89, 91,080.16 and 35,785.12 is: 49,383.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,999.89 : 91,080.16 = 35,785.12 : x
  2. Step 2: Convert to fraction form
    65,999.89/91,080.16 = 35,785.12/x
  3. Step 3: Cross multiply
    65,999.89x = 91,080.16 × 35,785.12
  4. Step 4: Simplify right side
    65,999.89x = 3,259,314,455.22
  5. Step 5: Solve for x
    x = 3,259,314,455.22/65,999.89
  6. Step 6: Final answer
    x = 49,383.63

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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.