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Finding the Fourth Proportional to 171,161.64, 256,868.64 and 81,204.72

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Solution

The fourth proportional to 171,161.64, 256,868.64 and 81,204.72 is: 121,866.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,161.64 : 256,868.64 = 81,204.72 : x
  2. Step 2: Convert to fraction form
    171,161.64/256,868.64 = 81,204.72/x
  3. Step 3: Cross multiply
    171,161.64x = 256,868.64 × 81,204.72
  4. Step 4: Simplify right side
    171,161.64x = 20,858,945,987.98
  5. Step 5: Solve for x
    x = 20,858,945,987.98/171,161.64
  6. Step 6: Final answer
    x = 121,866.94

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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.