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Finding the Fourth Proportional to 86,112.76, 118,893.56 and 77,009.88

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Solution

The fourth proportional to 86,112.76, 118,893.56 and 77,009.88 is: 106,325.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,112.76 : 118,893.56 = 77,009.88 : x
  2. Step 2: Convert to fraction form
    86,112.76/118,893.56 = 77,009.88/x
  3. Step 3: Cross multiply
    86,112.76x = 118,893.56 × 77,009.88
  4. Step 4: Simplify right side
    86,112.76x = 9,155,978,788.37
  5. Step 5: Solve for x
    x = 9,155,978,788.37/86,112.76
  6. Step 6: Final answer
    x = 106,325.46

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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.