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Finding the Fourth Proportional to 61,409.07, 91,579.43 and 54,605.43

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Solution

The fourth proportional to 61,409.07, 91,579.43 and 54,605.43 is: 81,433.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,409.07 : 91,579.43 = 54,605.43 : x
  2. Step 2: Convert to fraction form
    61,409.07/91,579.43 = 54,605.43/x
  3. Step 3: Cross multiply
    61,409.07x = 91,579.43 × 54,605.43
  4. Step 4: Simplify right side
    61,409.07x = 5,000,734,290.82
  5. Step 5: Solve for x
    x = 5,000,734,290.82/61,409.07
  6. Step 6: Final answer
    x = 81,433.15

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.