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Finding the Fourth Proportional to 170,837.88, 256,287.87 and 85,493.31

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Solution

The fourth proportional to 170,837.88, 256,287.87 and 85,493.31 is: 128,255.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,837.88 : 256,287.87 = 85,493.31 : x
  2. Step 2: Convert to fraction form
    170,837.88/256,287.87 = 85,493.31/x
  3. Step 3: Cross multiply
    170,837.88x = 256,287.87 × 85,493.31
  4. Step 4: Simplify right side
    170,837.88x = 21,910,898,319.15
  5. Step 5: Solve for x
    x = 21,910,898,319.15/170,837.88
  6. Step 6: Final answer
    x = 128,255.50

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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.