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Finding the Fourth Proportional to 170,999.88, 256,504.20 and 81,021.48

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Solution

The fourth proportional to 170,999.88, 256,504.20 and 81,021.48 is: 121,534.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,999.88 : 256,504.20 = 81,021.48 : x
  2. Step 2: Convert to fraction form
    170,999.88/256,504.20 = 81,021.48/x
  3. Step 3: Cross multiply
    170,999.88x = 256,504.20 × 81,021.48
  4. Step 4: Simplify right side
    170,999.88x = 20,782,349,910.22
  5. Step 5: Solve for x
    x = 20,782,349,910.22/170,999.88
  6. Step 6: Final answer
    x = 121,534.30

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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.