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Finding the Fourth Proportional to 80,624.40, 120,936.60 and 71,715.60

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Solution

The fourth proportional to 80,624.40, 120,936.60 and 71,715.60 is: 107,573.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,624.40 : 120,936.60 = 71,715.60 : x
  2. Step 2: Convert to fraction form
    80,624.40/120,936.60 = 71,715.60/x
  3. Step 3: Cross multiply
    80,624.40x = 120,936.60 × 71,715.60
  4. Step 4: Simplify right side
    80,624.40x = 8,673,040,830.96
  5. Step 5: Solve for x
    x = 8,673,040,830.96/80,624.40
  6. Step 6: Final answer
    x = 107,573.40

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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.