Home / 120,163.80-165,819.39-66,445.62

Finding the Fourth Proportional to 120,163.80, 165,819.39 and 66,445.62

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Solution

The fourth proportional to 120,163.80, 165,819.39 and 66,445.62 is: 91,691.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,163.80 : 165,819.39 = 66,445.62 : x
  2. Step 2: Convert to fraction form
    120,163.80/165,819.39 = 66,445.62/x
  3. Step 3: Cross multiply
    120,163.80x = 165,819.39 × 66,445.62
  4. Step 4: Simplify right side
    120,163.80x = 11,017,972,176.57
  5. Step 5: Solve for x
    x = 11,017,972,176.57/120,163.80
  6. Step 6: Final answer
    x = 91,691.28

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1.5x scale

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.