Home / 86,694.06-129,861.12-80,387.76

Finding the Fourth Proportional to 86,694.06, 129,861.12 and 80,387.76

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Solution

The fourth proportional to 86,694.06, 129,861.12 and 80,387.76 is: 120,414.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,694.06 : 129,861.12 = 80,387.76 : x
  2. Step 2: Convert to fraction form
    86,694.06/129,861.12 = 80,387.76/x
  3. Step 3: Cross multiply
    86,694.06x = 129,861.12 × 80,387.76
  4. Step 4: Simplify right side
    86,694.06x = 10,439,244,605.86
  5. Step 5: Solve for x
    x = 10,439,244,605.86/86,694.06
  6. Step 6: Final answer
    x = 120,414.76

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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.