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Finding the Fourth Proportional to 312,592.11, 468,839.07 and 99,331.94

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Solution

The fourth proportional to 312,592.11, 468,839.07 and 99,331.94 is: 148,982.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,592.11 : 468,839.07 = 99,331.94 : x
  2. Step 2: Convert to fraction form
    312,592.11/468,839.07 = 99,331.94/x
  3. Step 3: Cross multiply
    312,592.11x = 468,839.07 × 99,331.94
  4. Step 4: Simplify right side
    312,592.11x = 46,570,696,253.21
  5. Step 5: Solve for x
    x = 46,570,696,253.21/312,592.11
  6. Step 6: Final answer
    x = 148,982.32

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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.