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Finding the Fourth Proportional to 65,782.81, 98,680.43 and 18,397.88

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Solution

The fourth proportional to 65,782.81, 98,680.43 and 18,397.88 is: 27,598.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,782.81 : 98,680.43 = 18,397.88 : x
  2. Step 2: Convert to fraction form
    65,782.81/98,680.43 = 18,397.88/x
  3. Step 3: Cross multiply
    65,782.81x = 98,680.43 × 18,397.88
  4. Step 4: Simplify right side
    65,782.81x = 1,815,511,083.72
  5. Step 5: Solve for x
    x = 1,815,511,083.72/65,782.81
  6. Step 6: Final answer
    x = 27,598.56

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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.