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Finding the Fourth Proportional to 54,583.60, 81,918.60 and 21,319.60

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Solution

The fourth proportional to 54,583.60, 81,918.60 and 21,319.60 is: 31,996.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,583.60 : 81,918.60 = 21,319.60 : x
  2. Step 2: Convert to fraction form
    54,583.60/81,918.60 = 21,319.60/x
  3. Step 3: Cross multiply
    54,583.60x = 81,918.60 × 21,319.60
  4. Step 4: Simplify right side
    54,583.60x = 1,746,471,784.56
  5. Step 5: Solve for x
    x = 1,746,471,784.56/54,583.60
  6. Step 6: Final answer
    x = 31,996.27

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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.