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Finding the Fourth Proportional to 80,460.20, 120,690.30 and 74,628.20

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Solution

The fourth proportional to 80,460.20, 120,690.30 and 74,628.20 is: 111,942.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,460.20 : 120,690.30 = 74,628.20 : x
  2. Step 2: Convert to fraction form
    80,460.20/120,690.30 = 74,628.20/x
  3. Step 3: Cross multiply
    80,460.20x = 120,690.30 × 74,628.20
  4. Step 4: Simplify right side
    80,460.20x = 9,006,899,846.46
  5. Step 5: Solve for x
    x = 9,006,899,846.46/80,460.20
  6. Step 6: Final answer
    x = 111,942.30

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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.