Home / 259,321.36-388,981.92-81,846.16

Finding the Fourth Proportional to 259,321.36, 388,981.92 and 81,846.16

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Solution

The fourth proportional to 259,321.36, 388,981.92 and 81,846.16 is: 122,769.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,321.36 : 388,981.92 = 81,846.16 : x
  2. Step 2: Convert to fraction form
    259,321.36/388,981.92 = 81,846.16/x
  3. Step 3: Cross multiply
    259,321.36x = 388,981.92 × 81,846.16
  4. Step 4: Simplify right side
    259,321.36x = 31,836,676,461.43
  5. Step 5: Solve for x
    x = 31,836,676,461.43/259,321.36
  6. Step 6: Final answer
    x = 122,769.20

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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.