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Finding the Fourth Proportional to 120,134.67, 165,771.23 and 66,412.23

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Solution

The fourth proportional to 120,134.67, 165,771.23 and 66,412.23 is: 91,640.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,134.67 : 165,771.23 = 66,412.23 : x
  2. Step 2: Convert to fraction form
    120,134.67/165,771.23 = 66,412.23/x
  3. Step 3: Cross multiply
    120,134.67x = 165,771.23 × 66,412.23
  4. Step 4: Simplify right side
    120,134.67x = 11,009,236,556.70
  5. Step 5: Solve for x
    x = 11,009,236,556.70/120,134.67
  6. Step 6: Final answer
    x = 91,640.80

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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.