Home / 149,391.54-206,157.69-81,409.05

Finding the Fourth Proportional to 149,391.54, 206,157.69 and 81,409.05

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Solution

The fourth proportional to 149,391.54, 206,157.69 and 81,409.05 is: 112,343.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,391.54 : 206,157.69 = 81,409.05 : x
  2. Step 2: Convert to fraction form
    149,391.54/206,157.69 = 81,409.05/x
  3. Step 3: Cross multiply
    149,391.54x = 206,157.69 × 81,409.05
  4. Step 4: Simplify right side
    149,391.54x = 16,783,101,693.09
  5. Step 5: Solve for x
    x = 16,783,101,693.09/149,391.54
  6. Step 6: Final answer
    x = 112,343.05

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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.