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Finding the Fourth Proportional to 80,144.10, 120,216.15 and 72,756.90

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Solution

The fourth proportional to 80,144.10, 120,216.15 and 72,756.90 is: 109,135.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,144.10 : 120,216.15 = 72,756.90 : x
  2. Step 2: Convert to fraction form
    80,144.10/120,216.15 = 72,756.90/x
  3. Step 3: Cross multiply
    80,144.10x = 120,216.15 × 72,756.90
  4. Step 4: Simplify right side
    80,144.10x = 8,746,554,403.94
  5. Step 5: Solve for x
    x = 8,746,554,403.94/80,144.10
  6. Step 6: Final answer
    x = 109,135.35

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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.