Home / 54,258.45-81,401.85-20,979.60

Finding the Fourth Proportional to 54,258.45, 81,401.85 and 20,979.60

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Solution

The fourth proportional to 54,258.45, 81,401.85 and 20,979.60 is: 31,474.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,258.45 : 81,401.85 = 20,979.60 : x
  2. Step 2: Convert to fraction form
    54,258.45/81,401.85 = 20,979.60/x
  3. Step 3: Cross multiply
    54,258.45x = 81,401.85 × 20,979.60
  4. Step 4: Simplify right side
    54,258.45x = 1,707,778,252.26
  5. Step 5: Solve for x
    x = 1,707,778,252.26/54,258.45
  6. Step 6: Final answer
    x = 31,474.88

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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.