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Finding the Fourth Proportional to 169,700.72, 254,163.42 and 81,016.50

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Solution

The fourth proportional to 169,700.72, 254,163.42 and 81,016.50 is: 121,339.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,700.72 : 254,163.42 = 81,016.50 : x
  2. Step 2: Convert to fraction form
    169,700.72/254,163.42 = 81,016.50/x
  3. Step 3: Cross multiply
    169,700.72x = 254,163.42 × 81,016.50
  4. Step 4: Simplify right side
    169,700.72x = 20,591,431,669.54
  5. Step 5: Solve for x
    x = 20,591,431,669.54/169,700.72
  6. Step 6: Final answer
    x = 121,339.68

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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.