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Finding the Fourth Proportional to 65,920.80, 98,898.03 and 19,173.66

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Solution

The fourth proportional to 65,920.80, 98,898.03 and 19,173.66 is: 28,765.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,920.80 : 98,898.03 = 19,173.66 : x
  2. Step 2: Convert to fraction form
    65,920.80/98,898.03 = 19,173.66/x
  3. Step 3: Cross multiply
    65,920.80x = 98,898.03 × 19,173.66
  4. Step 4: Simplify right side
    65,920.80x = 1,896,237,201.89
  5. Step 5: Solve for x
    x = 1,896,237,201.89/65,920.80
  6. Step 6: Final answer
    x = 28,765.39

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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.