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Finding the Fourth Proportional to 120,279, 165,987.42 and 66,562.62

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Solution

The fourth proportional to 120,279, 165,987.42 and 66,562.62 is: 91,857.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,279 : 165,987.42 = 66,562.62 : x
  2. Step 2: Convert to fraction form
    120,279/165,987.42 = 66,562.62/x
  3. Step 3: Cross multiply
    120,279x = 165,987.42 × 66,562.62
  4. Step 4: Simplify right side
    120,279x = 11,048,557,562.24
  5. Step 5: Solve for x
    x = 11,048,557,562.24/120,279
  6. Step 6: Final answer
    x = 91,857.74

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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.