Home / 135,479.28-186,949.68-81,744.72

Finding the Fourth Proportional to 135,479.28, 186,949.68 and 81,744.72

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Solution

The fourth proportional to 135,479.28, 186,949.68 and 81,744.72 is: 112,800.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,479.28 : 186,949.68 = 81,744.72 : x
  2. Step 2: Convert to fraction form
    135,479.28/186,949.68 = 81,744.72/x
  3. Step 3: Cross multiply
    135,479.28x = 186,949.68 × 81,744.72
  4. Step 4: Simplify right side
    135,479.28x = 15,282,149,245.69
  5. Step 5: Solve for x
    x = 15,282,149,245.69/135,479.28
  6. Step 6: Final answer
    x = 112,800.64

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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.