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Finding the Fourth Proportional to 65,851.92, 90,805.46 and 53,091.59

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Solution

The fourth proportional to 65,851.92, 90,805.46 and 53,091.59 is: 73,209.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,851.92 : 90,805.46 = 53,091.59 : x
  2. Step 2: Convert to fraction form
    65,851.92/90,805.46 = 53,091.59/x
  3. Step 3: Cross multiply
    65,851.92x = 90,805.46 × 53,091.59
  4. Step 4: Simplify right side
    65,851.92x = 4,821,005,532.60
  5. Step 5: Solve for x
    x = 4,821,005,532.60/65,851.92
  6. Step 6: Final answer
    x = 73,209.79

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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.