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Finding the Fourth Proportional to 117,181.88, 161,720.92 and 66,203.96

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Solution

The fourth proportional to 117,181.88, 161,720.92 and 66,203.96 is: 91,367.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,181.88 : 161,720.92 = 66,203.96 : x
  2. Step 2: Convert to fraction form
    117,181.88/161,720.92 = 66,203.96/x
  3. Step 3: Cross multiply
    117,181.88x = 161,720.92 × 66,203.96
  4. Step 4: Simplify right side
    117,181.88x = 10,706,565,318.84
  5. Step 5: Solve for x
    x = 10,706,565,318.84/117,181.88
  6. Step 6: Final answer
    x = 91,367.07

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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.