Home / 135,011.58-186,212.43-81,240.54

Finding the Fourth Proportional to 135,011.58, 186,212.43 and 81,240.54

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Solution

The fourth proportional to 135,011.58, 186,212.43 and 81,240.54 is: 112,049.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,011.58 : 186,212.43 = 81,240.54 : x
  2. Step 2: Convert to fraction form
    135,011.58/186,212.43 = 81,240.54/x
  3. Step 3: Cross multiply
    135,011.58x = 186,212.43 × 81,240.54
  4. Step 4: Simplify right side
    135,011.58x = 15,127,998,367.91
  5. Step 5: Solve for x
    x = 15,127,998,367.91/135,011.58
  6. Step 6: Final answer
    x = 112,049.64

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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.