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Finding the Fourth Proportional to 259,563.70, 389,272.65 and 82,125.10

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Solution

The fourth proportional to 259,563.70, 389,272.65 and 82,125.10 is: 123,164.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,563.70 : 389,272.65 = 82,125.10 : x
  2. Step 2: Convert to fraction form
    259,563.70/389,272.65 = 82,125.10/x
  3. Step 3: Cross multiply
    259,563.70x = 389,272.65 × 82,125.10
  4. Step 4: Simplify right side
    259,563.70x = 31,969,055,308.52
  5. Step 5: Solve for x
    x = 31,969,055,308.52/259,563.70
  6. Step 6: Final answer
    x = 123,164.58

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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.