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Finding the Fourth Proportional to 80,103.80, 120,155.70 and 72,846.20

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Solution

The fourth proportional to 80,103.80, 120,155.70 and 72,846.20 is: 109,269.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,103.80 : 120,155.70 = 72,846.20 : x
  2. Step 2: Convert to fraction form
    80,103.80/120,155.70 = 72,846.20/x
  3. Step 3: Cross multiply
    80,103.80x = 120,155.70 × 72,846.20
  4. Step 4: Simplify right side
    80,103.80x = 8,752,886,153.34
  5. Step 5: Solve for x
    x = 8,752,886,153.34/80,103.80
  6. Step 6: Final answer
    x = 109,269.30

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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.