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Finding the Fourth Proportional to 120,860.92, 166,742.04 and 89,105.68

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Solution

The fourth proportional to 120,860.92, 166,742.04 and 89,105.68 is: 122,931.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,860.92 : 166,742.04 = 89,105.68 : x
  2. Step 2: Convert to fraction form
    120,860.92/166,742.04 = 89,105.68/x
  3. Step 3: Cross multiply
    120,860.92x = 166,742.04 × 89,105.68
  4. Step 4: Simplify right side
    120,860.92x = 14,857,662,858.79
  5. Step 5: Solve for x
    x = 14,857,662,858.79/120,860.92
  6. Step 6: Final answer
    x = 122,931.90

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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.