Home / 54,639.80-81,902.10-31,215.80

Finding the Fourth Proportional to 54,639.80, 81,902.10 and 31,215.80

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Solution

The fourth proportional to 54,639.80, 81,902.10 and 31,215.80 is: 46,790.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,639.80 : 81,902.10 = 31,215.80 : x
  2. Step 2: Convert to fraction form
    54,639.80/81,902.10 = 31,215.80/x
  3. Step 3: Cross multiply
    54,639.80x = 81,902.10 × 31,215.80
  4. Step 4: Simplify right side
    54,639.80x = 2,556,639,573.18
  5. Step 5: Solve for x
    x = 2,556,639,573.18/54,639.80
  6. Step 6: Final answer
    x = 46,790.79

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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.