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Finding the Fourth Proportional to 85,668.85, 128,548.22 and 35,105.41

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Solution

The fourth proportional to 85,668.85, 128,548.22 and 35,105.41 is: 52,676.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,668.85 : 128,548.22 = 35,105.41 : x
  2. Step 2: Convert to fraction form
    85,668.85/128,548.22 = 35,105.41/x
  3. Step 3: Cross multiply
    85,668.85x = 128,548.22 × 35,105.41
  4. Step 4: Simplify right side
    85,668.85x = 4,512,737,412.89
  5. Step 5: Solve for x
    x = 4,512,737,412.89/85,668.85
  6. Step 6: Final answer
    x = 52,676.53

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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.