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Finding the Fourth Proportional to 276,861.90, 415,389.21 and 87,351.51

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Solution

The fourth proportional to 276,861.90, 415,389.21 and 87,351.51 is: 131,057.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,861.90 : 415,389.21 = 87,351.51 : x
  2. Step 2: Convert to fraction form
    276,861.90/415,389.21 = 87,351.51/x
  3. Step 3: Cross multiply
    276,861.90x = 415,389.21 × 87,351.51
  4. Step 4: Simplify right side
    276,861.90x = 36,284,876,452.70
  5. Step 5: Solve for x
    x = 36,284,876,452.70/276,861.90
  6. Step 6: Final answer
    x = 131,057.67

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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.