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Finding the Fourth Proportional to 61,218.81, 91,817.64 and 16,835.04

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Solution

The fourth proportional to 61,218.81, 91,817.64 and 16,835.04 is: 25,249.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,218.81 : 91,817.64 = 16,835.04 : x
  2. Step 2: Convert to fraction form
    61,218.81/91,817.64 = 16,835.04/x
  3. Step 3: Cross multiply
    61,218.81x = 91,817.64 × 16,835.04
  4. Step 4: Simplify right side
    61,218.81x = 1,545,753,642.11
  5. Step 5: Solve for x
    x = 1,545,753,642.11/61,218.81
  6. Step 6: Final answer
    x = 25,249.65

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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.