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Finding the Fourth Proportional to 117,091.77, 161,580.54 and 68,686.97

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Solution

The fourth proportional to 117,091.77, 161,580.54 and 68,686.97 is: 94,784.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,091.77 : 161,580.54 = 68,686.97 : x
  2. Step 2: Convert to fraction form
    117,091.77/161,580.54 = 68,686.97/x
  3. Step 3: Cross multiply
    117,091.77x = 161,580.54 × 68,686.97
  4. Step 4: Simplify right side
    117,091.77x = 11,098,476,895.66
  5. Step 5: Solve for x
    x = 11,098,476,895.66/117,091.77
  6. Step 6: Final answer
    x = 94,784.43

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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.