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Finding the Fourth Proportional to 207,303.60, 310,805.76 and 80,836.68

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Solution

The fourth proportional to 207,303.60, 310,805.76 and 80,836.68 is: 121,196.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,303.60 : 310,805.76 = 80,836.68 : x
  2. Step 2: Convert to fraction form
    207,303.60/310,805.76 = 80,836.68/x
  3. Step 3: Cross multiply
    207,303.60x = 310,805.76 × 80,836.68
  4. Step 4: Simplify right side
    207,303.60x = 25,124,505,763.28
  5. Step 5: Solve for x
    x = 25,124,505,763.28/207,303.60
  6. Step 6: Final answer
    x = 121,196.67

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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.