Home / 81,083.92-121,626.32-53,180.68

Finding the Fourth Proportional to 81,083.92, 121,626.32 and 53,180.68

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Solution

The fourth proportional to 81,083.92, 121,626.32 and 53,180.68 is: 79,771.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,083.92 : 121,626.32 = 53,180.68 : x
  2. Step 2: Convert to fraction form
    81,083.92/121,626.32 = 53,180.68/x
  3. Step 3: Cross multiply
    81,083.92x = 121,626.32 × 53,180.68
  4. Step 4: Simplify right side
    81,083.92x = 6,468,170,403.50
  5. Step 5: Solve for x
    x = 6,468,170,403.50/81,083.92
  6. Step 6: Final answer
    x = 79,771.31

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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.