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Finding the Fourth Proportional to 333,812.20, 500,711.20 and 81,093.88

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Solution

The fourth proportional to 333,812.20, 500,711.20 and 81,093.88 is: 121,639.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    333,812.20 : 500,711.20 = 81,093.88 : x
  2. Step 2: Convert to fraction form
    333,812.20/500,711.20 = 81,093.88/x
  3. Step 3: Cross multiply
    333,812.20x = 500,711.20 × 81,093.88
  4. Step 4: Simplify right side
    333,812.20x = 40,604,613,967.46
  5. Step 5: Solve for x
    x = 40,604,613,967.46/333,812.20
  6. Step 6: Final answer
    x = 121,639.10

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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.