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Finding the Fourth Proportional to 80,578.80, 120,868.20 and 73,321.20

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Solution

The fourth proportional to 80,578.80, 120,868.20 and 73,321.20 is: 109,981.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,578.80 : 120,868.20 = 73,321.20 : x
  2. Step 2: Convert to fraction form
    80,578.80/120,868.20 = 73,321.20/x
  3. Step 3: Cross multiply
    80,578.80x = 120,868.20 × 73,321.20
  4. Step 4: Simplify right side
    80,578.80x = 8,862,201,465.84
  5. Step 5: Solve for x
    x = 8,862,201,465.84/80,578.80
  6. Step 6: Final answer
    x = 109,981.80

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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.