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Finding the Fourth Proportional to 220,771.71, 331,206.95 and 80,530.34

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Solution

The fourth proportional to 220,771.71, 331,206.95 and 80,530.34 is: 120,813.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,771.71 : 331,206.95 = 80,530.34 : x
  2. Step 2: Convert to fraction form
    220,771.71/331,206.95 = 80,530.34/x
  3. Step 3: Cross multiply
    220,771.71x = 331,206.95 × 80,530.34
  4. Step 4: Simplify right side
    220,771.71x = 26,672,208,293.86
  5. Step 5: Solve for x
    x = 26,672,208,293.86/220,771.71
  6. Step 6: Final answer
    x = 120,813.52

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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.