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Finding the Fourth Proportional to 129,553.76, 193,891.73 and 79,665.46

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Solution

The fourth proportional to 129,553.76, 193,891.73 and 79,665.46 is: 119,228.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,553.76 : 193,891.73 = 79,665.46 : x
  2. Step 2: Convert to fraction form
    129,553.76/193,891.73 = 79,665.46/x
  3. Step 3: Cross multiply
    129,553.76x = 193,891.73 × 79,665.46
  4. Step 4: Simplify right side
    129,553.76x = 15,446,472,977.59
  5. Step 5: Solve for x
    x = 15,446,472,977.59/129,553.76
  6. Step 6: Final answer
    x = 119,228.29

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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.