Home / 135,109.72-186,327.43-81,301.33

Finding the Fourth Proportional to 135,109.72, 186,327.43 and 81,301.33

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Solution

The fourth proportional to 135,109.72, 186,327.43 and 81,301.33 is: 112,121.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,109.72 : 186,327.43 = 81,301.33 : x
  2. Step 2: Convert to fraction form
    135,109.72/186,327.43 = 81,301.33/x
  3. Step 3: Cross multiply
    135,109.72x = 186,327.43 × 81,301.33
  4. Step 4: Simplify right side
    135,109.72x = 15,148,667,874.48
  5. Step 5: Solve for x
    x = 15,148,667,874.48/135,109.72
  6. Step 6: Final answer
    x = 112,121.23

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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.