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Finding the Fourth Proportional to 65,763.92, 98,665.32 and 19,017.20

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Solution

The fourth proportional to 65,763.92, 98,665.32 and 19,017.20 is: 28,531.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,763.92 : 98,665.32 = 19,017.20 : x
  2. Step 2: Convert to fraction form
    65,763.92/98,665.32 = 19,017.20/x
  3. Step 3: Cross multiply
    65,763.92x = 98,665.32 × 19,017.20
  4. Step 4: Simplify right side
    65,763.92x = 1,876,337,630.18
  5. Step 5: Solve for x
    x = 1,876,337,630.18/65,763.92
  6. Step 6: Final answer
    x = 28,531.42

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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.