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Finding the Fourth Proportional to 129,208.80, 193,375.80 and 113,462.40

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Solution

The fourth proportional to 129,208.80, 193,375.80 and 113,462.40 is: 169,809.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,208.80 : 193,375.80 = 113,462.40 : x
  2. Step 2: Convert to fraction form
    129,208.80/193,375.80 = 113,462.40/x
  3. Step 3: Cross multiply
    129,208.80x = 193,375.80 × 113,462.40
  4. Step 4: Simplify right side
    129,208.80x = 21,940,882,369.92
  5. Step 5: Solve for x
    x = 21,940,882,369.92/129,208.80
  6. Step 6: Final answer
    x = 169,809.51

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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.