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Finding the Fourth Proportional to 80,694.45, 111,381.80 and 53,836.90

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Solution

The fourth proportional to 80,694.45, 111,381.80 and 53,836.90 is: 74,310.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,694.45 : 111,381.80 = 53,836.90 : x
  2. Step 2: Convert to fraction form
    80,694.45/111,381.80 = 53,836.90/x
  3. Step 3: Cross multiply
    80,694.45x = 111,381.80 × 53,836.90
  4. Step 4: Simplify right side
    80,694.45x = 5,996,450,280.78
  5. Step 5: Solve for x
    x = 5,996,450,280.78/80,694.45
  6. Step 6: Final answer
    x = 74,310.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.