Home / 120,815.39-166,720.64-67,103.87

Finding the Fourth Proportional to 120,815.39, 166,720.64 and 67,103.87

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Solution

The fourth proportional to 120,815.39, 166,720.64 and 67,103.87 is: 92,600.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,815.39 : 166,720.64 = 67,103.87 : x
  2. Step 2: Convert to fraction form
    120,815.39/166,720.64 = 67,103.87/x
  3. Step 3: Cross multiply
    120,815.39x = 166,720.64 × 67,103.87
  4. Step 4: Simplify right side
    120,815.39x = 11,187,598,983.75
  5. Step 5: Solve for x
    x = 11,187,598,983.75/120,815.39
  6. Step 6: Final answer
    x = 92,600.78

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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.