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Finding the Fourth Proportional to 220,986.70, 331,504.35 and 80,775.70

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Solution

The fourth proportional to 220,986.70, 331,504.35 and 80,775.70 is: 121,172.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,986.70 : 331,504.35 = 80,775.70 : x
  2. Step 2: Convert to fraction form
    220,986.70/331,504.35 = 80,775.70/x
  3. Step 3: Cross multiply
    220,986.70x = 331,504.35 × 80,775.70
  4. Step 4: Simplify right side
    220,986.70x = 26,777,495,924.30
  5. Step 5: Solve for x
    x = 26,777,495,924.30/220,986.70
  6. Step 6: Final answer
    x = 121,172.43

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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.