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Finding the Fourth Proportional to 199,906.40, 299,816.40 and 87,586.40

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Solution

The fourth proportional to 199,906.40, 299,816.40 and 87,586.40 is: 131,360.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,906.40 : 299,816.40 = 87,586.40 : x
  2. Step 2: Convert to fraction form
    199,906.40/299,816.40 = 87,586.40/x
  3. Step 3: Cross multiply
    199,906.40x = 299,816.40 × 87,586.40
  4. Step 4: Simplify right side
    199,906.40x = 26,259,839,136.96
  5. Step 5: Solve for x
    x = 26,259,839,136.96/199,906.40
  6. Step 6: Final answer
    x = 131,360.67

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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.