Home / 120,139.66-165,791.64-66,426.04

Finding the Fourth Proportional to 120,139.66, 165,791.64 and 66,426.04

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Solution

The fourth proportional to 120,139.66, 165,791.64 and 66,426.04 is: 91,667.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,139.66 : 165,791.64 = 66,426.04 : x
  2. Step 2: Convert to fraction form
    120,139.66/165,791.64 = 66,426.04/x
  3. Step 3: Cross multiply
    120,139.66x = 165,791.64 × 66,426.04
  4. Step 4: Simplify right side
    120,139.66x = 11,012,882,110.31
  5. Step 5: Solve for x
    x = 11,012,882,110.31/120,139.66
  6. Step 6: Final answer
    x = 91,667.33

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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.