Home / 120,131.26-165,784.60-66,419.75

Finding the Fourth Proportional to 120,131.26, 165,784.60 and 66,419.75

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Solution

The fourth proportional to 120,131.26, 165,784.60 and 66,419.75 is: 91,661.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,131.26 : 165,784.60 = 66,419.75 : x
  2. Step 2: Convert to fraction form
    120,131.26/165,784.60 = 66,419.75/x
  3. Step 3: Cross multiply
    120,131.26x = 165,784.60 × 66,419.75
  4. Step 4: Simplify right side
    120,131.26x = 11,011,371,685.85
  5. Step 5: Solve for x
    x = 11,011,371,685.85/120,131.26
  6. Step 6: Final answer
    x = 91,661.17

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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.