Home / 81,154.73-122,286.04-66,687.72

Finding the Fourth Proportional to 81,154.73, 122,286.04 and 66,687.72

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Solution

The fourth proportional to 81,154.73, 122,286.04 and 66,687.72 is: 100,486.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,154.73 : 122,286.04 = 66,687.72 : x
  2. Step 2: Convert to fraction form
    81,154.73/122,286.04 = 66,687.72/x
  3. Step 3: Cross multiply
    81,154.73x = 122,286.04 × 66,687.72
  4. Step 4: Simplify right side
    81,154.73x = 8,154,976,861.99
  5. Step 5: Solve for x
    x = 8,154,976,861.99/81,154.73
  6. Step 6: Final answer
    x = 100,486.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.