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Finding the Fourth Proportional to 171,247.39, 256,865.77 and 81,354.80

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Solution

The fourth proportional to 171,247.39, 256,865.77 and 81,354.80 is: 122,029.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,247.39 : 256,865.77 = 81,354.80 : x
  2. Step 2: Convert to fraction form
    171,247.39/256,865.77 = 81,354.80/x
  3. Step 3: Cross multiply
    171,247.39x = 256,865.77 × 81,354.80
  4. Step 4: Simplify right side
    171,247.39x = 20,897,262,186.56
  5. Step 5: Solve for x
    x = 20,897,262,186.56/171,247.39
  6. Step 6: Final answer
    x = 122,029.67

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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.