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Finding the Fourth Proportional to 54,489.92, 81,744.60 and 21,228.08

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Solution

The fourth proportional to 54,489.92, 81,744.60 and 21,228.08 is: 31,845.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,489.92 : 81,744.60 = 21,228.08 : x
  2. Step 2: Convert to fraction form
    54,489.92/81,744.60 = 21,228.08/x
  3. Step 3: Cross multiply
    54,489.92x = 81,744.60 × 21,228.08
  4. Step 4: Simplify right side
    54,489.92x = 1,735,280,908.37
  5. Step 5: Solve for x
    x = 1,735,280,908.37/54,489.92
  6. Step 6: Final answer
    x = 31,845.91

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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.