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Finding the Fourth Proportional to 65,911.84, 98,876.40 and 19,163.68

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Solution

The fourth proportional to 65,911.84, 98,876.40 and 19,163.68 is: 28,748.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,911.84 : 98,876.40 = 19,163.68 : x
  2. Step 2: Convert to fraction form
    65,911.84/98,876.40 = 19,163.68/x
  3. Step 3: Cross multiply
    65,911.84x = 98,876.40 × 19,163.68
  4. Step 4: Simplify right side
    65,911.84x = 1,894,835,689.15
  5. Step 5: Solve for x
    x = 1,894,835,689.15/65,911.84
  6. Step 6: Final answer
    x = 28,748.03

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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.