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Finding the Fourth Proportional to 117,270.72, 161,861.76 and 66,998.88

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Solution

The fourth proportional to 117,270.72, 161,861.76 and 66,998.88 is: 92,474.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,270.72 : 161,861.76 = 66,998.88 : x
  2. Step 2: Convert to fraction form
    117,270.72/161,861.76 = 66,998.88/x
  3. Step 3: Cross multiply
    117,270.72x = 161,861.76 × 66,998.88
  4. Step 4: Simplify right side
    117,270.72x = 10,844,556,634.83
  5. Step 5: Solve for x
    x = 10,844,556,634.83/117,270.72
  6. Step 6: Final answer
    x = 92,474.55

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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.