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Finding the Fourth Proportional to 108,761.40, 150,092.19 and 61,011.90

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Solution

The fourth proportional to 108,761.40, 150,092.19 and 61,011.90 is: 84,197.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,761.40 : 150,092.19 = 61,011.90 : x
  2. Step 2: Convert to fraction form
    108,761.40/150,092.19 = 61,011.90/x
  3. Step 3: Cross multiply
    108,761.40x = 150,092.19 × 61,011.90
  4. Step 4: Simplify right side
    108,761.40x = 9,157,409,687.06
  5. Step 5: Solve for x
    x = 9,157,409,687.06/108,761.40
  6. Step 6: Final answer
    x = 84,197.24

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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.