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Finding the Fourth Proportional to 220,109.34, 330,295.17 and 79,878.90

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Solution

The fourth proportional to 220,109.34, 330,295.17 and 79,878.90 is: 119,865.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,109.34 : 330,295.17 = 79,878.90 : x
  2. Step 2: Convert to fraction form
    220,109.34/330,295.17 = 79,878.90/x
  3. Step 3: Cross multiply
    220,109.34x = 330,295.17 × 79,878.90
  4. Step 4: Simplify right side
    220,109.34x = 26,383,614,854.91
  5. Step 5: Solve for x
    x = 26,383,614,854.91/220,109.34
  6. Step 6: Final answer
    x = 119,865.95

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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.