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Finding the Fourth Proportional to 235,643.11, 325,188.89 and 128,213.89

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Solution

The fourth proportional to 235,643.11, 325,188.89 and 128,213.89 is: 176,935.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,643.11 : 325,188.89 = 128,213.89 : x
  2. Step 2: Convert to fraction form
    235,643.11/325,188.89 = 128,213.89/x
  3. Step 3: Cross multiply
    235,643.11x = 325,188.89 × 128,213.89
  4. Step 4: Simplify right side
    235,643.11x = 41,693,732,571.68
  5. Step 5: Solve for x
    x = 41,693,732,571.68/235,643.11
  6. Step 6: Final answer
    x = 176,935.93

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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.