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Finding the Fourth Proportional to 156,991.77, 216,654.35 and 89,936.73

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Solution

The fourth proportional to 156,991.77, 216,654.35 and 89,936.73 is: 124,115.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,991.77 : 216,654.35 = 89,936.73 : x
  2. Step 2: Convert to fraction form
    156,991.77/216,654.35 = 89,936.73/x
  3. Step 3: Cross multiply
    156,991.77x = 216,654.35 × 89,936.73
  4. Step 4: Simplify right side
    156,991.77x = 19,485,183,329.59
  5. Step 5: Solve for x
    x = 19,485,183,329.59/156,991.77
  6. Step 6: Final answer
    x = 124,115.95

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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.