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Finding the Fourth Proportional to 235,813.91, 325,429.05 and 128,389.84

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Solution

The fourth proportional to 235,813.91, 325,429.05 and 128,389.84 is: 177,181.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,813.91 : 325,429.05 = 128,389.84 : x
  2. Step 2: Convert to fraction form
    235,813.91/325,429.05 = 128,389.84/x
  3. Step 3: Cross multiply
    235,813.91x = 325,429.05 × 128,389.84
  4. Step 4: Simplify right side
    235,813.91x = 41,781,783,660.85
  5. Step 5: Solve for x
    x = 41,781,783,660.85/235,813.91
  6. Step 6: Final answer
    x = 177,181.17

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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.