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Finding the Fourth Proportional to 108,988.86, 150,408.42 and 61,241.24

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Solution

The fourth proportional to 108,988.86, 150,408.42 and 61,241.24 is: 84,515.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,988.86 : 150,408.42 = 61,241.24 : x
  2. Step 2: Convert to fraction form
    108,988.86/150,408.42 = 61,241.24/x
  3. Step 3: Cross multiply
    108,988.86x = 150,408.42 × 61,241.24
  4. Step 4: Simplify right side
    108,988.86x = 9,211,198,147.24
  5. Step 5: Solve for x
    x = 9,211,198,147.24/108,988.86
  6. Step 6: Final answer
    x = 84,515.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.