Home / 54,291.20-81,278.40-38,739.20

Finding the Fourth Proportional to 54,291.20, 81,278.40 and 38,739.20

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Solution

The fourth proportional to 54,291.20, 81,278.40 and 38,739.20 is: 57,995.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,291.20 : 81,278.40 = 38,739.20 : x
  2. Step 2: Convert to fraction form
    54,291.20/81,278.40 = 38,739.20/x
  3. Step 3: Cross multiply
    54,291.20x = 81,278.40 × 38,739.20
  4. Step 4: Simplify right side
    54,291.20x = 3,148,660,193.28
  5. Step 5: Solve for x
    x = 3,148,660,193.28/54,291.20
  6. Step 6: Final answer
    x = 57,995.77

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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.