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Finding the Fourth Proportional to 169,706.21, 254,171.72 and 81,022.28

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Solution

The fourth proportional to 169,706.21, 254,171.72 and 81,022.28 is: 121,348.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,706.21 : 254,171.72 = 81,022.28 : x
  2. Step 2: Convert to fraction form
    169,706.21/254,171.72 = 81,022.28/x
  3. Step 3: Cross multiply
    169,706.21x = 254,171.72 × 81,022.28
  4. Step 4: Simplify right side
    169,706.21x = 20,593,571,197.62
  5. Step 5: Solve for x
    x = 20,593,571,197.62/169,706.21
  6. Step 6: Final answer
    x = 121,348.37

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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.