Home / 120,151.86-165,795-66,429.54

Finding the Fourth Proportional to 120,151.86, 165,795 and 66,429.54

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Solution

The fourth proportional to 120,151.86, 165,795 and 66,429.54 is: 91,664.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,151.86 : 165,795 = 66,429.54 : x
  2. Step 2: Convert to fraction form
    120,151.86/165,795 = 66,429.54/x
  3. Step 3: Cross multiply
    120,151.86x = 165,795 × 66,429.54
  4. Step 4: Simplify right side
    120,151.86x = 11,013,685,584.30
  5. Step 5: Solve for x
    x = 11,013,685,584.30/120,151.86
  6. Step 6: Final answer
    x = 91,664.71

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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.