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Finding the Fourth Proportional to 80,409.80, 120,744.30 and 54,230.60

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Solution

The fourth proportional to 80,409.80, 120,744.30 and 54,230.60 is: 81,433.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,409.80 : 120,744.30 = 54,230.60 : x
  2. Step 2: Convert to fraction form
    80,409.80/120,744.30 = 54,230.60/x
  3. Step 3: Cross multiply
    80,409.80x = 120,744.30 × 54,230.60
  4. Step 4: Simplify right side
    80,409.80x = 6,548,035,835.58
  5. Step 5: Solve for x
    x = 6,548,035,835.58/80,409.80
  6. Step 6: Final answer
    x = 81,433.31

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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.