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Finding the Fourth Proportional to 85,136.70, 127,719.08 and 25,958.54

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Solution

The fourth proportional to 85,136.70, 127,719.08 and 25,958.54 is: 38,942.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,136.70 : 127,719.08 = 25,958.54 : x
  2. Step 2: Convert to fraction form
    85,136.70/127,719.08 = 25,958.54/x
  3. Step 3: Cross multiply
    85,136.70x = 127,719.08 × 25,958.54
  4. Step 4: Simplify right side
    85,136.70x = 3,315,400,846.94
  5. Step 5: Solve for x
    x = 3,315,400,846.94/85,136.70
  6. Step 6: Final answer
    x = 38,942.09

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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.