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Finding the Fourth Proportional to 80,591.40, 120,911.40 and 43,169.40

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Solution

The fourth proportional to 80,591.40, 120,911.40 and 43,169.40 is: 64,767.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,591.40 : 120,911.40 = 43,169.40 : x
  2. Step 2: Convert to fraction form
    80,591.40/120,911.40 = 43,169.40/x
  3. Step 3: Cross multiply
    80,591.40x = 120,911.40 × 43,169.40
  4. Step 4: Simplify right side
    80,591.40x = 5,219,672,591.16
  5. Step 5: Solve for x
    x = 5,219,672,591.16/80,591.40
  6. Step 6: Final answer
    x = 64,767.12

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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.