Home / 80,509.20-120,763.76-30,589.28

Finding the Fourth Proportional to 80,509.20, 120,763.76 and 30,589.28

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Solution

The fourth proportional to 80,509.20, 120,763.76 and 30,589.28 is: 45,883.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,509.20 : 120,763.76 = 30,589.28 : x
  2. Step 2: Convert to fraction form
    80,509.20/120,763.76 = 30,589.28/x
  3. Step 3: Cross multiply
    80,509.20x = 120,763.76 × 30,589.28
  4. Step 4: Simplify right side
    80,509.20x = 3,694,076,468.49
  5. Step 5: Solve for x
    x = 3,694,076,468.49/80,509.20
  6. Step 6: Final answer
    x = 45,883.90

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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.