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Finding the Fourth Proportional to 84,656.82, 126,985.92 and 68,843.46

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Solution

The fourth proportional to 84,656.82, 126,985.92 and 68,843.46 is: 103,265.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,656.82 : 126,985.92 = 68,843.46 : x
  2. Step 2: Convert to fraction form
    84,656.82/126,985.92 = 68,843.46/x
  3. Step 3: Cross multiply
    84,656.82x = 126,985.92 × 68,843.46
  4. Step 4: Simplify right side
    84,656.82x = 8,742,150,104.08
  5. Step 5: Solve for x
    x = 8,742,150,104.08/84,656.82
  6. Step 6: Final answer
    x = 103,265.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.