Home / 120,105.22-165,745.15-66,390.26

Finding the Fourth Proportional to 120,105.22, 165,745.15 and 66,390.26

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Solution

The fourth proportional to 120,105.22, 165,745.15 and 66,390.26 is: 91,618.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,105.22 : 165,745.15 = 66,390.26 : x
  2. Step 2: Convert to fraction form
    120,105.22/165,745.15 = 66,390.26/x
  3. Step 3: Cross multiply
    120,105.22x = 165,745.15 × 66,390.26
  4. Step 4: Simplify right side
    120,105.22x = 11,003,863,602.24
  5. Step 5: Solve for x
    x = 11,003,863,602.24/120,105.22
  6. Step 6: Final answer
    x = 91,618.53

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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.