Home / 54,123.47-81,185.31-20,859.20

Finding the Fourth Proportional to 54,123.47, 81,185.31 and 20,859.20

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Solution

The fourth proportional to 54,123.47, 81,185.31 and 20,859.20 is: 31,288.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,123.47 : 81,185.31 = 20,859.20 : x
  2. Step 2: Convert to fraction form
    54,123.47/81,185.31 = 20,859.20/x
  3. Step 3: Cross multiply
    54,123.47x = 81,185.31 × 20,859.20
  4. Step 4: Simplify right side
    54,123.47x = 1,693,460,821.32
  5. Step 5: Solve for x
    x = 1,693,460,821.32/54,123.47
  6. Step 6: Final answer
    x = 31,288.84

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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.