Home / 259,316.28-388,974.48-81,837.12

Finding the Fourth Proportional to 259,316.28, 388,974.48 and 81,837.12

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Solution

The fourth proportional to 259,316.28, 388,974.48 and 81,837.12 is: 122,755.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,316.28 : 388,974.48 = 81,837.12 : x
  2. Step 2: Convert to fraction form
    259,316.28/388,974.48 = 81,837.12/x
  3. Step 3: Cross multiply
    259,316.28x = 388,974.48 × 81,837.12
  4. Step 4: Simplify right side
    259,316.28x = 31,832,551,196.70
  5. Step 5: Solve for x
    x = 31,832,551,196.70/259,316.28
  6. Step 6: Final answer
    x = 122,755.70

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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.