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Finding the Fourth Proportional to 64,912.80, 96,899.62 and 57,039.60

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Solution

The fourth proportional to 64,912.80, 96,899.62 and 57,039.60 is: 85,146.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,912.80 : 96,899.62 = 57,039.60 : x
  2. Step 2: Convert to fraction form
    64,912.80/96,899.62 = 57,039.60/x
  3. Step 3: Cross multiply
    64,912.80x = 96,899.62 × 57,039.60
  4. Step 4: Simplify right side
    64,912.80x = 5,527,115,564.95
  5. Step 5: Solve for x
    x = 5,527,115,564.95/64,912.80
  6. Step 6: Final answer
    x = 85,146.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.