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Finding the Fourth Proportional to 120,887.64, 166,822.74 and 67,171.68

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Solution

The fourth proportional to 120,887.64, 166,822.74 and 67,171.68 is: 92,695.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,887.64 : 166,822.74 = 67,171.68 : x
  2. Step 2: Convert to fraction form
    120,887.64/166,822.74 = 67,171.68/x
  3. Step 3: Cross multiply
    120,887.64x = 166,822.74 × 67,171.68
  4. Step 4: Simplify right side
    120,887.64x = 11,205,763,708.00
  5. Step 5: Solve for x
    x = 11,205,763,708.00/120,887.64
  6. Step 6: Final answer
    x = 92,695.69

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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.