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Finding the Fourth Proportional to 79,912.80, 119,912.40 and 35,546.40

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Solution

The fourth proportional to 79,912.80, 119,912.40 and 35,546.40 is: 53,338.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,912.80 : 119,912.40 = 35,546.40 : x
  2. Step 2: Convert to fraction form
    79,912.80/119,912.40 = 35,546.40/x
  3. Step 3: Cross multiply
    79,912.80x = 119,912.40 × 35,546.40
  4. Step 4: Simplify right side
    79,912.80x = 4,262,454,135.36
  5. Step 5: Solve for x
    x = 4,262,454,135.36/79,912.80
  6. Step 6: Final answer
    x = 53,338.82

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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.