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Finding the Fourth Proportional to 86,739.68, 119,768.60 and 66,564.60

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Solution

The fourth proportional to 86,739.68, 119,768.60 and 66,564.60 is: 91,911.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,739.68 : 119,768.60 = 66,564.60 : x
  2. Step 2: Convert to fraction form
    86,739.68/119,768.60 = 66,564.60/x
  3. Step 3: Cross multiply
    86,739.68x = 119,768.60 × 66,564.60
  4. Step 4: Simplify right side
    86,739.68x = 7,972,349,155.32
  5. Step 5: Solve for x
    x = 7,972,349,155.32/86,739.68
  6. Step 6: Final answer
    x = 91,911.22

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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.