Home / 258,519.33-387,783.86-81,022.41

Finding the Fourth Proportional to 258,519.33, 387,783.86 and 81,022.41

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Solution

The fourth proportional to 258,519.33, 387,783.86 and 81,022.41 is: 121,535.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,519.33 : 387,783.86 = 81,022.41 : x
  2. Step 2: Convert to fraction form
    258,519.33/387,783.86 = 81,022.41/x
  3. Step 3: Cross multiply
    258,519.33x = 387,783.86 × 81,022.41
  4. Step 4: Simplify right side
    258,519.33x = 31,419,183,865.76
  5. Step 5: Solve for x
    x = 31,419,183,865.76/258,519.33
  6. Step 6: Final answer
    x = 121,535.14

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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.