Home / 120,306.78-166,021.23-66,590.61

Finding the Fourth Proportional to 120,306.78, 166,021.23 and 66,590.61

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Solution

The fourth proportional to 120,306.78, 166,021.23 and 66,590.61 is: 91,893.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,306.78 : 166,021.23 = 66,590.61 : x
  2. Step 2: Convert to fraction form
    120,306.78/166,021.23 = 66,590.61/x
  3. Step 3: Cross multiply
    120,306.78x = 166,021.23 × 66,590.61
  4. Step 4: Simplify right side
    120,306.78x = 11,055,454,978.65
  5. Step 5: Solve for x
    x = 11,055,454,978.65/120,306.78
  6. Step 6: Final answer
    x = 91,893.86

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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.