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Finding the Fourth Proportional to 115,920.32, 173,659.76 and 66,034.80

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Solution

The fourth proportional to 115,920.32, 173,659.76 and 66,034.80 is: 98,926.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,920.32 : 173,659.76 = 66,034.80 : x
  2. Step 2: Convert to fraction form
    115,920.32/173,659.76 = 66,034.80/x
  3. Step 3: Cross multiply
    115,920.32x = 173,659.76 × 66,034.80
  4. Step 4: Simplify right side
    115,920.32x = 11,467,587,519.65
  5. Step 5: Solve for x
    x = 11,467,587,519.65/115,920.32
  6. Step 6: Final answer
    x = 98,926.47

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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.