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Finding the Fourth Proportional to 129,553.65, 193,891.53 and 79,665.34

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Solution

The fourth proportional to 129,553.65, 193,891.53 and 79,665.34 is: 119,228.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,553.65 : 193,891.53 = 79,665.34 : x
  2. Step 2: Convert to fraction form
    129,553.65/193,891.53 = 79,665.34/x
  3. Step 3: Cross multiply
    129,553.65x = 193,891.53 × 79,665.34
  4. Step 4: Simplify right side
    129,553.65x = 15,446,434,660.57
  5. Step 5: Solve for x
    x = 15,446,434,660.57/129,553.65
  6. Step 6: Final answer
    x = 119,228.09

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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.