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Finding the Fourth Proportional to 54,260.70, 81,403.20 and 20,977.80

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Solution

The fourth proportional to 54,260.70, 81,403.20 and 20,977.80 is: 31,471.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,260.70 : 81,403.20 = 20,977.80 : x
  2. Step 2: Convert to fraction form
    54,260.70/81,403.20 = 20,977.80/x
  3. Step 3: Cross multiply
    54,260.70x = 81,403.20 × 20,977.80
  4. Step 4: Simplify right side
    54,260.70x = 1,707,660,048.96
  5. Step 5: Solve for x
    x = 1,707,660,048.96/54,260.70
  6. Step 6: Final answer
    x = 31,471.40

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1.5x scale

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.