Home / 54,243.20-81,206.40-38,691.20

Finding the Fourth Proportional to 54,243.20, 81,206.40 and 38,691.20

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Solution

The fourth proportional to 54,243.20, 81,206.40 and 38,691.20 is: 57,923.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,243.20 : 81,206.40 = 38,691.20 : x
  2. Step 2: Convert to fraction form
    54,243.20/81,206.40 = 38,691.20/x
  3. Step 3: Cross multiply
    54,243.20x = 81,206.40 × 38,691.20
  4. Step 4: Simplify right side
    54,243.20x = 3,141,973,063.68
  5. Step 5: Solve for x
    x = 3,141,973,063.68/54,243.20
  6. Step 6: Final answer
    x = 57,923.81

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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.