Home / 54,128.25-81,143.17-20,827.07

Finding the Fourth Proportional to 54,128.25, 81,143.17 and 20,827.07

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Solution

The fourth proportional to 54,128.25, 81,143.17 and 20,827.07 is: 31,221.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,128.25 : 81,143.17 = 20,827.07 : x
  2. Step 2: Convert to fraction form
    54,128.25/81,143.17 = 20,827.07/x
  3. Step 3: Cross multiply
    54,128.25x = 81,143.17 × 20,827.07
  4. Step 4: Simplify right side
    54,128.25x = 1,689,974,784.55
  5. Step 5: Solve for x
    x = 1,689,974,784.55/54,128.25
  6. Step 6: Final answer
    x = 31,221.68

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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.