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Finding the Fourth Proportional to 169,997.80, 254,923.80 and 85,725.40

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Solution

The fourth proportional to 169,997.80, 254,923.80 and 85,725.40 is: 128,551.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,997.80 : 254,923.80 = 85,725.40 : x
  2. Step 2: Convert to fraction form
    169,997.80/254,923.80 = 85,725.40/x
  3. Step 3: Cross multiply
    169,997.80x = 254,923.80 × 85,725.40
  4. Step 4: Simplify right side
    169,997.80x = 21,853,444,724.52
  5. Step 5: Solve for x
    x = 21,853,444,724.52/169,997.80
  6. Step 6: Final answer
    x = 128,551.34

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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.