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Finding the Fourth Proportional to 80,168.40, 120,544.20 and 78,418.80

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Solution

The fourth proportional to 80,168.40, 120,544.20 and 78,418.80 is: 117,913.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,168.40 : 120,544.20 = 78,418.80 : x
  2. Step 2: Convert to fraction form
    80,168.40/120,544.20 = 78,418.80/x
  3. Step 3: Cross multiply
    80,168.40x = 120,544.20 × 78,418.80
  4. Step 4: Simplify right side
    80,168.40x = 9,452,931,510.96
  5. Step 5: Solve for x
    x = 9,452,931,510.96/80,168.40
  6. Step 6: Final answer
    x = 117,913.44

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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.