Home / 149,491.29-206,299.61-81,507.72

Finding the Fourth Proportional to 149,491.29, 206,299.61 and 81,507.72

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Solution

The fourth proportional to 149,491.29, 206,299.61 and 81,507.72 is: 112,481.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,491.29 : 206,299.61 = 81,507.72 : x
  2. Step 2: Convert to fraction form
    149,491.29/206,299.61 = 81,507.72/x
  3. Step 3: Cross multiply
    149,491.29x = 206,299.61 × 81,507.72
  4. Step 4: Simplify right side
    149,491.29x = 16,815,010,847.99
  5. Step 5: Solve for x
    x = 16,815,010,847.99/149,491.29
  6. Step 6: Final answer
    x = 112,481.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.