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Finding the Fourth Proportional to 235,686.76, 325,254.64 and 128,263.76

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Solution

The fourth proportional to 235,686.76, 325,254.64 and 128,263.76 is: 177,007.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,686.76 : 325,254.64 = 128,263.76 : x
  2. Step 2: Convert to fraction form
    235,686.76/325,254.64 = 128,263.76/x
  3. Step 3: Cross multiply
    235,686.76x = 325,254.64 × 128,263.76
  4. Step 4: Simplify right side
    235,686.76x = 41,718,383,083.85
  5. Step 5: Solve for x
    x = 41,718,383,083.85/235,686.76
  6. Step 6: Final answer
    x = 177,007.75

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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.