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Finding the Fourth Proportional to 206,133.76, 309,215.04 and 65,903.68

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Solution

The fourth proportional to 206,133.76, 309,215.04 and 65,903.68 is: 98,860.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,133.76 : 309,215.04 = 65,903.68 : x
  2. Step 2: Convert to fraction form
    206,133.76/309,215.04 = 65,903.68/x
  3. Step 3: Cross multiply
    206,133.76x = 309,215.04 × 65,903.68
  4. Step 4: Simplify right side
    206,133.76x = 20,378,409,047.35
  5. Step 5: Solve for x
    x = 20,378,409,047.35/206,133.76
  6. Step 6: Final answer
    x = 98,860.12

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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.