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Finding the Fourth Proportional to 120,891.08, 166,826.36 and 67,174.72

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Solution

The fourth proportional to 120,891.08, 166,826.36 and 67,174.72 is: 92,699.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,891.08 : 166,826.36 = 67,174.72 : x
  2. Step 2: Convert to fraction form
    120,891.08/166,826.36 = 67,174.72/x
  3. Step 3: Cross multiply
    120,891.08x = 166,826.36 × 67,174.72
  4. Step 4: Simplify right side
    120,891.08x = 11,206,514,021.62
  5. Step 5: Solve for x
    x = 11,206,514,021.62/120,891.08
  6. Step 6: Final answer
    x = 92,699.26

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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.