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Finding the Fourth Proportional to 135,447.62, 186,919.11 and 81,722.25

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Solution

The fourth proportional to 135,447.62, 186,919.11 and 81,722.25 is: 112,777.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,447.62 : 186,919.11 = 81,722.25 : x
  2. Step 2: Convert to fraction form
    135,447.62/186,919.11 = 81,722.25/x
  3. Step 3: Cross multiply
    135,447.62x = 186,919.11 × 81,722.25
  4. Step 4: Simplify right side
    135,447.62x = 15,275,450,237.20
  5. Step 5: Solve for x
    x = 15,275,450,237.20/135,447.62
  6. Step 6: Final answer
    x = 112,777.55

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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.