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Finding the Fourth Proportional to 215,885.20, 323,770.20 and 75,629.20

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Solution

The fourth proportional to 215,885.20, 323,770.20 and 75,629.20 is: 113,423.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,885.20 : 323,770.20 = 75,629.20 : x
  2. Step 2: Convert to fraction form
    215,885.20/323,770.20 = 75,629.20/x
  3. Step 3: Cross multiply
    215,885.20x = 323,770.20 × 75,629.20
  4. Step 4: Simplify right side
    215,885.20x = 24,486,481,209.84
  5. Step 5: Solve for x
    x = 24,486,481,209.84/215,885.20
  6. Step 6: Final answer
    x = 113,423.62

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1.5x scale

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.