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Finding the Fourth Proportional to 84,759.63, 116,984.43 and 56,079.87

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Solution

The fourth proportional to 84,759.63, 116,984.43 and 56,079.87 is: 77,400.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,759.63 : 116,984.43 = 56,079.87 : x
  2. Step 2: Convert to fraction form
    84,759.63/116,984.43 = 56,079.87/x
  3. Step 3: Cross multiply
    84,759.63x = 116,984.43 × 56,079.87
  4. Step 4: Simplify right side
    84,759.63x = 6,560,471,626.42
  5. Step 5: Solve for x
    x = 6,560,471,626.42/84,759.63
  6. Step 6: Final answer
    x = 77,400.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.