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Finding the Fourth Proportional to 103,344.80, 154,786.80 and 84,912.80

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Solution

The fourth proportional to 103,344.80, 154,786.80 and 84,912.80 is: 127,179.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,344.80 : 154,786.80 = 84,912.80 : x
  2. Step 2: Convert to fraction form
    103,344.80/154,786.80 = 84,912.80/x
  3. Step 3: Cross multiply
    103,344.80x = 154,786.80 × 84,912.80
  4. Step 4: Simplify right side
    103,344.80x = 13,143,380,591.04
  5. Step 5: Solve for x
    x = 13,143,380,591.04/103,344.80
  6. Step 6: Final answer
    x = 127,179.89

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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.