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Finding the Fourth Proportional to 235,784.66, 325,382.83 and 128,355.48

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Solution

The fourth proportional to 235,784.66, 325,382.83 and 128,355.48 is: 177,130.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,784.66 : 325,382.83 = 128,355.48 : x
  2. Step 2: Convert to fraction form
    235,784.66/325,382.83 = 128,355.48/x
  3. Step 3: Cross multiply
    235,784.66x = 325,382.83 × 128,355.48
  4. Step 4: Simplify right side
    235,784.66x = 41,764,669,328.41
  5. Step 5: Solve for x
    x = 41,764,669,328.41/235,784.66
  6. Step 6: Final answer
    x = 177,130.56

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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.