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Finding the Fourth Proportional to 104,220.80, 156,100.80 and 80,662.40

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Solution

The fourth proportional to 104,220.80, 156,100.80 and 80,662.40 is: 120,815.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,220.80 : 156,100.80 = 80,662.40 : x
  2. Step 2: Convert to fraction form
    104,220.80/156,100.80 = 80,662.40/x
  3. Step 3: Cross multiply
    104,220.80x = 156,100.80 × 80,662.40
  4. Step 4: Simplify right side
    104,220.80x = 12,591,465,169.92
  5. Step 5: Solve for x
    x = 12,591,465,169.92/104,220.80
  6. Step 6: Final answer
    x = 120,815.28

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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.