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Finding the Fourth Proportional to 54,255.70, 81,395.98 and 20,976.04

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Solution

The fourth proportional to 54,255.70, 81,395.98 and 20,976.04 is: 31,468.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,255.70 : 81,395.98 = 20,976.04 : x
  2. Step 2: Convert to fraction form
    54,255.70/81,395.98 = 20,976.04/x
  3. Step 3: Cross multiply
    54,255.70x = 81,395.98 × 20,976.04
  4. Step 4: Simplify right side
    54,255.70x = 1,707,365,332.32
  5. Step 5: Solve for x
    x = 1,707,365,332.32/54,255.70
  6. Step 6: Final answer
    x = 31,468.87

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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.