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Finding the Fourth Proportional to 81,465.60, 122,198.40 and 80,153.40

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Solution

The fourth proportional to 81,465.60, 122,198.40 and 80,153.40 is: 120,230.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,465.60 : 122,198.40 = 80,153.40 : x
  2. Step 2: Convert to fraction form
    81,465.60/122,198.40 = 80,153.40/x
  3. Step 3: Cross multiply
    81,465.60x = 122,198.40 × 80,153.40
  4. Step 4: Simplify right side
    81,465.60x = 9,794,617,234.56
  5. Step 5: Solve for x
    x = 9,794,617,234.56/81,465.60
  6. Step 6: Final answer
    x = 120,230.10

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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.