Home / 81,579.66-122,369.48-28,991.22

Finding the Fourth Proportional to 81,579.66, 122,369.48 and 28,991.22

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Solution

The fourth proportional to 81,579.66, 122,369.48 and 28,991.22 is: 43,486.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,579.66 : 122,369.48 = 28,991.22 : x
  2. Step 2: Convert to fraction form
    81,579.66/122,369.48 = 28,991.22/x
  3. Step 3: Cross multiply
    81,579.66x = 122,369.48 × 28,991.22
  4. Step 4: Simplify right side
    81,579.66x = 3,547,640,183.92
  5. Step 5: Solve for x
    x = 3,547,640,183.92/81,579.66
  6. Step 6: Final answer
    x = 43,486.82

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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.