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Finding the Fourth Proportional to 79,660.80, 119,507.58 and 66,604.41

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Solution

The fourth proportional to 79,660.80, 119,507.58 and 66,604.41 is: 99,920.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,660.80 : 119,507.58 = 66,604.41 : x
  2. Step 2: Convert to fraction form
    79,660.80/119,507.58 = 66,604.41/x
  3. Step 3: Cross multiply
    79,660.80x = 119,507.58 × 66,604.41
  4. Step 4: Simplify right side
    79,660.80x = 7,959,731,856.43
  5. Step 5: Solve for x
    x = 7,959,731,856.43/79,660.80
  6. Step 6: Final answer
    x = 99,920.31

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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.