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Finding the Fourth Proportional to 99,093.97, 136,710.75 and 56,629.72

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Solution

The fourth proportional to 99,093.97, 136,710.75 and 56,629.72 is: 78,126.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,093.97 : 136,710.75 = 56,629.72 : x
  2. Step 2: Convert to fraction form
    99,093.97/136,710.75 = 56,629.72/x
  3. Step 3: Cross multiply
    99,093.97x = 136,710.75 × 56,629.72
  4. Step 4: Simplify right side
    99,093.97x = 7,741,891,493.49
  5. Step 5: Solve for x
    x = 7,741,891,493.49/99,093.97
  6. Step 6: Final answer
    x = 78,126.77

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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.