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Finding the Fourth Proportional to 129,201.19, 193,839.45 and 79,313.29

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Solution

The fourth proportional to 129,201.19, 193,839.45 and 79,313.29 is: 118,993.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,201.19 : 193,839.45 = 79,313.29 : x
  2. Step 2: Convert to fraction form
    129,201.19/193,839.45 = 79,313.29/x
  3. Step 3: Cross multiply
    129,201.19x = 193,839.45 × 79,313.29
  4. Step 4: Simplify right side
    129,201.19x = 15,374,044,511.29
  5. Step 5: Solve for x
    x = 15,374,044,511.29/129,201.19
  6. Step 6: Final answer
    x = 118,993.06

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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.