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Finding the Fourth Proportional to 111,515.94, 153,887.85 and 63,768.06

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Solution

The fourth proportional to 111,515.94, 153,887.85 and 63,768.06 is: 87,997.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,515.94 : 153,887.85 = 63,768.06 : x
  2. Step 2: Convert to fraction form
    111,515.94/153,887.85 = 63,768.06/x
  3. Step 3: Cross multiply
    111,515.94x = 153,887.85 × 63,768.06
  4. Step 4: Simplify right side
    111,515.94x = 9,813,129,652.07
  5. Step 5: Solve for x
    x = 9,813,129,652.07/111,515.94
  6. Step 6: Final answer
    x = 87,997.55

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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.