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Finding the Fourth Proportional to 120,104.58, 165,741.39 and 66,388.21

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Solution

The fourth proportional to 120,104.58, 165,741.39 and 66,388.21 is: 91,614.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,104.58 : 165,741.39 = 66,388.21 : x
  2. Step 2: Convert to fraction form
    120,104.58/165,741.39 = 66,388.21/x
  3. Step 3: Cross multiply
    120,104.58x = 165,741.39 × 66,388.21
  4. Step 4: Simplify right side
    120,104.58x = 11,003,274,205.01
  5. Step 5: Solve for x
    x = 11,003,274,205.01/120,104.58
  6. Step 6: Final answer
    x = 91,614.11

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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.