Home / 149,415.54-206,190.90-81,433.32

Finding the Fourth Proportional to 149,415.54, 206,190.90 and 81,433.32

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Solution

The fourth proportional to 149,415.54, 206,190.90 and 81,433.32 is: 112,376.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,415.54 : 206,190.90 = 81,433.32 : x
  2. Step 2: Convert to fraction form
    149,415.54/206,190.90 = 81,433.32/x
  3. Step 3: Cross multiply
    149,415.54x = 206,190.90 × 81,433.32
  4. Step 4: Simplify right side
    149,415.54x = 16,790,809,540.79
  5. Step 5: Solve for x
    x = 16,790,809,540.79/149,415.54
  6. Step 6: Final answer
    x = 112,376.59

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1.5x scale

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.