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Finding the Fourth Proportional to 235,634.55, 325,165.97 and 128,205.01

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Solution

The fourth proportional to 235,634.55, 325,165.97 and 128,205.01 is: 176,917.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,634.55 : 325,165.97 = 128,205.01 : x
  2. Step 2: Convert to fraction form
    235,634.55/325,165.97 = 128,205.01/x
  3. Step 3: Cross multiply
    235,634.55x = 325,165.97 × 128,205.01
  4. Step 4: Simplify right side
    235,634.55x = 41,687,906,435.51
  5. Step 5: Solve for x
    x = 41,687,906,435.51/235,634.55
  6. Step 6: Final answer
    x = 176,917.63

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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.