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Finding the Fourth Proportional to 43,776.17, 65,679.77 and 21,605.11

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Solution

The fourth proportional to 43,776.17, 65,679.77 and 21,605.11 is: 32,415.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,776.17 : 65,679.77 = 21,605.11 : x
  2. Step 2: Convert to fraction form
    43,776.17/65,679.77 = 21,605.11/x
  3. Step 3: Cross multiply
    43,776.17x = 65,679.77 × 21,605.11
  4. Step 4: Simplify right side
    43,776.17x = 1,419,018,670.01
  5. Step 5: Solve for x
    x = 1,419,018,670.01/43,776.17
  6. Step 6: Final answer
    x = 32,415.33

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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.