Home / 128,185.12-192,241.32-53,212.60

Finding the Fourth Proportional to 128,185.12, 192,241.32 and 53,212.60

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Solution

The fourth proportional to 128,185.12, 192,241.32 and 53,212.60 is: 79,803.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,185.12 : 192,241.32 = 53,212.60 : x
  2. Step 2: Convert to fraction form
    128,185.12/192,241.32 = 53,212.60/x
  3. Step 3: Cross multiply
    128,185.12x = 192,241.32 × 53,212.60
  4. Step 4: Simplify right side
    128,185.12x = 10,229,660,464.63
  5. Step 5: Solve for x
    x = 10,229,660,464.63/128,185.12
  6. Step 6: Final answer
    x = 79,803.81

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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.