Home / 129,668.23-178,942.94-81,943.03

Finding the Fourth Proportional to 129,668.23, 178,942.94 and 81,943.03

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Solution

The fourth proportional to 129,668.23, 178,942.94 and 81,943.03 is: 113,081.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,668.23 : 178,942.94 = 81,943.03 : x
  2. Step 2: Convert to fraction form
    129,668.23/178,942.94 = 81,943.03/x
  3. Step 3: Cross multiply
    129,668.23x = 178,942.94 × 81,943.03
  4. Step 4: Simplify right side
    129,668.23x = 14,663,126,700.71
  5. Step 5: Solve for x
    x = 14,663,126,700.71/129,668.23
  6. Step 6: Final answer
    x = 113,081.88

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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.