Home / 149,805.48-206,729.82-81,821.64

Finding the Fourth Proportional to 149,805.48, 206,729.82 and 81,821.64

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Solution

The fourth proportional to 149,805.48, 206,729.82 and 81,821.64 is: 112,912.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,805.48 : 206,729.82 = 81,821.64 : x
  2. Step 2: Convert to fraction form
    149,805.48/206,729.82 = 81,821.64/x
  3. Step 3: Cross multiply
    149,805.48x = 206,729.82 × 81,821.64
  4. Step 4: Simplify right side
    149,805.48x = 16,914,972,909.30
  5. Step 5: Solve for x
    x = 16,914,972,909.30/149,805.48
  6. Step 6: Final answer
    x = 112,912.91

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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.