Home / 205,581.09-308,488.29-81,009.57

Finding the Fourth Proportional to 205,581.09, 308,488.29 and 81,009.57

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Solution

The fourth proportional to 205,581.09, 308,488.29 and 81,009.57 is: 121,560.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,581.09 : 308,488.29 = 81,009.57 : x
  2. Step 2: Convert to fraction form
    205,581.09/308,488.29 = 81,009.57/x
  3. Step 3: Cross multiply
    205,581.09x = 308,488.29 × 81,009.57
  4. Step 4: Simplify right side
    205,581.09x = 24,990,503,722.94
  5. Step 5: Solve for x
    x = 24,990,503,722.94/205,581.09
  6. Step 6: Final answer
    x = 121,560.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.