Home / 129,588.05-178,770.39-75,839.78

Finding the Fourth Proportional to 129,588.05, 178,770.39 and 75,839.78

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Solution

The fourth proportional to 129,588.05, 178,770.39 and 75,839.78 is: 104,623.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,588.05 : 178,770.39 = 75,839.78 : x
  2. Step 2: Convert to fraction form
    129,588.05/178,770.39 = 75,839.78/x
  3. Step 3: Cross multiply
    129,588.05x = 178,770.39 × 75,839.78
  4. Step 4: Simplify right side
    129,588.05x = 13,557,907,048.11
  5. Step 5: Solve for x
    x = 13,557,907,048.11/129,588.05
  6. Step 6: Final answer
    x = 104,623.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.