Home / 120,134.12-165,777.72-66,415.92

Finding the Fourth Proportional to 120,134.12, 165,777.72 and 66,415.92

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Solution

The fourth proportional to 120,134.12, 165,777.72 and 66,415.92 is: 91,649.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,134.12 : 165,777.72 = 66,415.92 : x
  2. Step 2: Convert to fraction form
    120,134.12/165,777.72 = 66,415.92/x
  3. Step 3: Cross multiply
    120,134.12x = 165,777.72 × 66,415.92
  4. Step 4: Simplify right side
    120,134.12x = 11,010,279,789.30
  5. Step 5: Solve for x
    x = 11,010,279,789.30/120,134.12
  6. Step 6: Final answer
    x = 91,649.90

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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.