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Finding the Fourth Proportional to 120,876.30, 166,761.53 and 69,879.65

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Solution

The fourth proportional to 120,876.30, 166,761.53 and 69,879.65 is: 96,406.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,876.30 : 166,761.53 = 69,879.65 : x
  2. Step 2: Convert to fraction form
    120,876.30/166,761.53 = 69,879.65/x
  3. Step 3: Cross multiply
    120,876.30x = 166,761.53 × 69,879.65
  4. Step 4: Simplify right side
    120,876.30x = 11,653,236,708.72
  5. Step 5: Solve for x
    x = 11,653,236,708.72/120,876.30
  6. Step 6: Final answer
    x = 96,406.30

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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.