Home / 54,371.05-81,528.90-21,100.66

Finding the Fourth Proportional to 54,371.05, 81,528.90 and 21,100.66

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Solution

The fourth proportional to 54,371.05, 81,528.90 and 21,100.66 is: 31,640.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,371.05 : 81,528.90 = 21,100.66 : x
  2. Step 2: Convert to fraction form
    54,371.05/81,528.90 = 21,100.66/x
  3. Step 3: Cross multiply
    54,371.05x = 81,528.90 × 21,100.66
  4. Step 4: Simplify right side
    54,371.05x = 1,720,313,599.07
  5. Step 5: Solve for x
    x = 1,720,313,599.07/54,371.05
  6. Step 6: Final answer
    x = 31,640.25

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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.