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Finding the Fourth Proportional to 120,778.76, 166,669.64 and 67,060.58

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Solution

The fourth proportional to 120,778.76, 166,669.64 and 67,060.58 is: 92,540.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,778.76 : 166,669.64 = 67,060.58 : x
  2. Step 2: Convert to fraction form
    120,778.76/166,669.64 = 67,060.58/x
  3. Step 3: Cross multiply
    120,778.76x = 166,669.64 × 67,060.58
  4. Step 4: Simplify right side
    120,778.76x = 11,176,961,558.14
  5. Step 5: Solve for x
    x = 11,176,961,558.14/120,778.76
  6. Step 6: Final answer
    x = 92,540.79

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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.