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Finding the Fourth Proportional to 235,686.88, 325,254.72 and 128,263.84

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Solution

The fourth proportional to 235,686.88, 325,254.72 and 128,263.84 is: 177,007.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,686.88 : 325,254.72 = 128,263.84 : x
  2. Step 2: Convert to fraction form
    235,686.88/325,254.72 = 128,263.84/x
  3. Step 3: Cross multiply
    235,686.88x = 325,254.72 × 128,263.84
  4. Step 4: Simplify right side
    235,686.88x = 41,718,419,365.32
  5. Step 5: Solve for x
    x = 41,718,419,365.32/235,686.88
  6. Step 6: Final answer
    x = 177,007.81

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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.