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Finding the Fourth Proportional to 82,279.68, 123,409.80 and 21,485.88

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Solution

The fourth proportional to 82,279.68, 123,409.80 and 21,485.88 is: 32,226.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,279.68 : 123,409.80 = 21,485.88 : x
  2. Step 2: Convert to fraction form
    82,279.68/123,409.80 = 21,485.88/x
  3. Step 3: Cross multiply
    82,279.68x = 123,409.80 × 21,485.88
  4. Step 4: Simplify right side
    82,279.68x = 2,651,568,153.62
  5. Step 5: Solve for x
    x = 2,651,568,153.62/82,279.68
  6. Step 6: Final answer
    x = 32,226.28

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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.