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Finding the Fourth Proportional to 171,353.44, 256,877.56 and 81,340.61

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Solution

The fourth proportional to 171,353.44, 256,877.56 and 81,340.61 is: 121,938.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,353.44 : 256,877.56 = 81,340.61 : x
  2. Step 2: Convert to fraction form
    171,353.44/256,877.56 = 81,340.61/x
  3. Step 3: Cross multiply
    171,353.44x = 256,877.56 × 81,340.61
  4. Step 4: Simplify right side
    171,353.44x = 20,894,576,243.00
  5. Step 5: Solve for x
    x = 20,894,576,243.00/171,353.44
  6. Step 6: Final answer
    x = 121,938.47

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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.