Home / 80,560.20-120,840.30-76,672.20

Finding the Fourth Proportional to 80,560.20, 120,840.30 and 76,672.20

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Solution

The fourth proportional to 80,560.20, 120,840.30 and 76,672.20 is: 115,008.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,560.20 : 120,840.30 = 76,672.20 : x
  2. Step 2: Convert to fraction form
    80,560.20/120,840.30 = 76,672.20/x
  3. Step 3: Cross multiply
    80,560.20x = 120,840.30 × 76,672.20
  4. Step 4: Simplify right side
    80,560.20x = 9,265,091,649.66
  5. Step 5: Solve for x
    x = 9,265,091,649.66/80,560.20
  6. Step 6: Final answer
    x = 115,008.30

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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.