Home / 54,436.92-81,687-21,179.94

Finding the Fourth Proportional to 54,436.92, 81,687 and 21,179.94

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Solution

The fourth proportional to 54,436.92, 81,687 and 21,179.94 is: 31,782.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,436.92 : 81,687 = 21,179.94 : x
  2. Step 2: Convert to fraction form
    54,436.92/81,687 = 21,179.94/x
  3. Step 3: Cross multiply
    54,436.92x = 81,687 × 21,179.94
  4. Step 4: Simplify right side
    54,436.92x = 1,730,125,758.78
  5. Step 5: Solve for x
    x = 1,730,125,758.78/54,436.92
  6. Step 6: Final answer
    x = 31,782.21

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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.