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Finding the Fourth Proportional to 120,104.33, 165,741.05 and 66,387.96

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Solution

The fourth proportional to 120,104.33, 165,741.05 and 66,387.96 is: 91,613.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,104.33 : 165,741.05 = 66,387.96 : x
  2. Step 2: Convert to fraction form
    120,104.33/165,741.05 = 66,387.96/x
  3. Step 3: Cross multiply
    120,104.33x = 165,741.05 × 66,387.96
  4. Step 4: Simplify right side
    120,104.33x = 11,003,209,865.82
  5. Step 5: Solve for x
    x = 11,003,209,865.82/120,104.33
  6. Step 6: Final answer
    x = 91,613.77

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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.