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Finding the Fourth Proportional to 171,112.67, 256,712.75 and 71,239.67

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Solution

The fourth proportional to 171,112.67, 256,712.75 and 71,239.67 is: 106,877.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,112.67 : 256,712.75 = 71,239.67 : x
  2. Step 2: Convert to fraction form
    171,112.67/256,712.75 = 71,239.67/x
  3. Step 3: Cross multiply
    171,112.67x = 256,712.75 × 71,239.67
  4. Step 4: Simplify right side
    171,112.67x = 18,288,129,955.03
  5. Step 5: Solve for x
    x = 18,288,129,955.03/171,112.67
  6. Step 6: Final answer
    x = 106,877.71

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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.