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Finding the Fourth Proportional to 80,207.70, 120,311.55 and 73,209.30

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Solution

The fourth proportional to 80,207.70, 120,311.55 and 73,209.30 is: 109,813.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,207.70 : 120,311.55 = 73,209.30 : x
  2. Step 2: Convert to fraction form
    80,207.70/120,311.55 = 73,209.30/x
  3. Step 3: Cross multiply
    80,207.70x = 120,311.55 × 73,209.30
  4. Step 4: Simplify right side
    80,207.70x = 8,807,924,357.42
  5. Step 5: Solve for x
    x = 8,807,924,357.42/80,207.70
  6. Step 6: Final answer
    x = 109,813.95

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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.