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Finding the Fourth Proportional to 150,579.20, 225,868.80 and 80,422.40

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Solution

The fourth proportional to 150,579.20, 225,868.80 and 80,422.40 is: 120,633.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    150,579.20 : 225,868.80 = 80,422.40 : x
  2. Step 2: Convert to fraction form
    150,579.20/225,868.80 = 80,422.40/x
  3. Step 3: Cross multiply
    150,579.20x = 225,868.80 × 80,422.40
  4. Step 4: Simplify right side
    150,579.20x = 18,164,910,981.12
  5. Step 5: Solve for x
    x = 18,164,910,981.12/150,579.20
  6. Step 6: Final answer
    x = 120,633.60

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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.