Home / 149,864.05-206,809.98-81,879.57

Finding the Fourth Proportional to 149,864.05, 206,809.98 and 81,879.57

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Solution

The fourth proportional to 149,864.05, 206,809.98 and 81,879.57 is: 112,992.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,864.05 : 206,809.98 = 81,879.57 : x
  2. Step 2: Convert to fraction form
    149,864.05/206,809.98 = 81,879.57/x
  3. Step 3: Cross multiply
    149,864.05x = 206,809.98 × 81,879.57
  4. Step 4: Simplify right side
    149,864.05x = 16,933,511,717.08
  5. Step 5: Solve for x
    x = 16,933,511,717.08/149,864.05
  6. Step 6: Final answer
    x = 112,992.49

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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.