Home / 54,531.30-81,736.20-21,240.30

Finding the Fourth Proportional to 54,531.30, 81,736.20 and 21,240.30

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Solution

The fourth proportional to 54,531.30, 81,736.20 and 21,240.30 is: 31,836.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,531.30 : 81,736.20 = 21,240.30 : x
  2. Step 2: Convert to fraction form
    54,531.30/81,736.20 = 21,240.30/x
  3. Step 3: Cross multiply
    54,531.30x = 81,736.20 × 21,240.30
  4. Step 4: Simplify right side
    54,531.30x = 1,736,101,408.86
  5. Step 5: Solve for x
    x = 1,736,101,408.86/54,531.30
  6. Step 6: Final answer
    x = 31,836.79

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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.