Home / 54,103.25-81,129.33-31,620.38

Finding the Fourth Proportional to 54,103.25, 81,129.33 and 31,620.38

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Solution

The fourth proportional to 54,103.25, 81,129.33 and 31,620.38 is: 47,415.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,103.25 : 81,129.33 = 31,620.38 : x
  2. Step 2: Convert to fraction form
    54,103.25/81,129.33 = 31,620.38/x
  3. Step 3: Cross multiply
    54,103.25x = 81,129.33 × 31,620.38
  4. Step 4: Simplify right side
    54,103.25x = 2,565,339,838.10
  5. Step 5: Solve for x
    x = 2,565,339,838.10/54,103.25
  6. Step 6: Final answer
    x = 47,415.63

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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.