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Finding the Fourth Proportional to 128,765.68, 193,185.78 and 53,847.16

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Solution

The fourth proportional to 128,765.68, 193,185.78 and 53,847.16 is: 80,786.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,765.68 : 193,185.78 = 53,847.16 : x
  2. Step 2: Convert to fraction form
    128,765.68/193,185.78 = 53,847.16/x
  3. Step 3: Cross multiply
    128,765.68x = 193,185.78 × 53,847.16
  4. Step 4: Simplify right side
    128,765.68x = 10,402,505,605.38
  5. Step 5: Solve for x
    x = 10,402,505,605.38/128,765.68
  6. Step 6: Final answer
    x = 80,786.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.