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Finding the Fourth Proportional to 136,238, 188,019.96 and 76,633.52

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Solution

The fourth proportional to 136,238, 188,019.96 and 76,633.52 is: 105,760.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,238 : 188,019.96 = 76,633.52 : x
  2. Step 2: Convert to fraction form
    136,238/188,019.96 = 76,633.52/x
  3. Step 3: Cross multiply
    136,238x = 188,019.96 × 76,633.52
  4. Step 4: Simplify right side
    136,238x = 14,408,631,365.06
  5. Step 5: Solve for x
    x = 14,408,631,365.06/136,238
  6. Step 6: Final answer
    x = 105,760.74

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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.