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Finding the Fourth Proportional to 207,921.51, 311,920.70 and 65,802.60

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Solution

The fourth proportional to 207,921.51, 311,920.70 and 65,802.60 is: 98,716.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,921.51 : 311,920.70 = 65,802.60 : x
  2. Step 2: Convert to fraction form
    207,921.51/311,920.70 = 65,802.60/x
  3. Step 3: Cross multiply
    207,921.51x = 311,920.70 × 65,802.60
  4. Step 4: Simplify right side
    207,921.51x = 20,525,192,724.81
  5. Step 5: Solve for x
    x = 20,525,192,724.81/207,921.51
  6. Step 6: Final answer
    x = 98,716.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.