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Finding the Fourth Proportional to 38,136, 57,137.28 and 26,456.64

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Solution

The fourth proportional to 38,136, 57,137.28 and 26,456.64 is: 39,638.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,136 : 57,137.28 = 26,456.64 : x
  2. Step 2: Convert to fraction form
    38,136/57,137.28 = 26,456.64/x
  3. Step 3: Cross multiply
    38,136x = 57,137.28 × 26,456.64
  4. Step 4: Simplify right side
    38,136x = 1,511,660,447.54
  5. Step 5: Solve for x
    x = 1,511,660,447.54/38,136
  6. Step 6: Final answer
    x = 39,638.67

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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.