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Finding the Fourth Proportional to 80,464.60, 120,696.90 and 43,139.80

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Solution

The fourth proportional to 80,464.60, 120,696.90 and 43,139.80 is: 64,709.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,464.60 : 120,696.90 = 43,139.80 : x
  2. Step 2: Convert to fraction form
    80,464.60/120,696.90 = 43,139.80/x
  3. Step 3: Cross multiply
    80,464.60x = 120,696.90 × 43,139.80
  4. Step 4: Simplify right side
    80,464.60x = 5,206,840,126.62
  5. Step 5: Solve for x
    x = 5,206,840,126.62/80,464.60
  6. Step 6: Final answer
    x = 64,709.70

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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.