Home / 149,431.09-206,213.08-81,447.85

Finding the Fourth Proportional to 149,431.09, 206,213.08 and 81,447.85

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Solution

The fourth proportional to 149,431.09, 206,213.08 and 81,447.85 is: 112,397.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,431.09 : 206,213.08 = 81,447.85 : x
  2. Step 2: Convert to fraction form
    149,431.09/206,213.08 = 81,447.85/x
  3. Step 3: Cross multiply
    149,431.09x = 206,213.08 × 81,447.85
  4. Step 4: Simplify right side
    149,431.09x = 16,795,612,007.88
  5. Step 5: Solve for x
    x = 16,795,612,007.88/149,431.09
  6. Step 6: Final answer
    x = 112,397.04

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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.