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Finding the Fourth Proportional to 169,991.91, 255,043.34 and 81,252.33

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Solution

The fourth proportional to 169,991.91, 255,043.34 and 81,252.33 is: 121,905.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,991.91 : 255,043.34 = 81,252.33 : x
  2. Step 2: Convert to fraction form
    169,991.91/255,043.34 = 81,252.33/x
  3. Step 3: Cross multiply
    169,991.91x = 255,043.34 × 81,252.33
  4. Step 4: Simplify right side
    169,991.91x = 20,722,865,219.72
  5. Step 5: Solve for x
    x = 20,722,865,219.72/169,991.91
  6. Step 6: Final answer
    x = 121,905.01

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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.