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Finding the Fourth Proportional to 215,909.40, 323,766.90 and 82,745.40

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Solution

The fourth proportional to 215,909.40, 323,766.90 and 82,745.40 is: 124,080.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,909.40 : 323,766.90 = 82,745.40 : x
  2. Step 2: Convert to fraction form
    215,909.40/323,766.90 = 82,745.40/x
  3. Step 3: Cross multiply
    215,909.40x = 323,766.90 × 82,745.40
  4. Step 4: Simplify right side
    215,909.40x = 26,790,221,647.26
  5. Step 5: Solve for x
    x = 26,790,221,647.26/215,909.40
  6. Step 6: Final answer
    x = 124,080.85

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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.