Home / 54,129.20-81,179.40-16,689.20

Finding the Fourth Proportional to 54,129.20, 81,179.40 and 16,689.20

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Solution

The fourth proportional to 54,129.20, 81,179.40 and 16,689.20 is: 25,029.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,129.20 : 81,179.40 = 16,689.20 : x
  2. Step 2: Convert to fraction form
    54,129.20/81,179.40 = 16,689.20/x
  3. Step 3: Cross multiply
    54,129.20x = 81,179.40 × 16,689.20
  4. Step 4: Simplify right side
    54,129.20x = 1,354,819,242.48
  5. Step 5: Solve for x
    x = 1,354,819,242.48/54,129.20
  6. Step 6: Final answer
    x = 25,029.36

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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.