Home / 135,414.09-186,858.40-80,955.50

Finding the Fourth Proportional to 135,414.09, 186,858.40 and 80,955.50

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Solution

The fourth proportional to 135,414.09, 186,858.40 and 80,955.50 is: 111,710.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,414.09 : 186,858.40 = 80,955.50 : x
  2. Step 2: Convert to fraction form
    135,414.09/186,858.40 = 80,955.50/x
  3. Step 3: Cross multiply
    135,414.09x = 186,858.40 × 80,955.50
  4. Step 4: Simplify right side
    135,414.09x = 15,127,215,201.20
  5. Step 5: Solve for x
    x = 15,127,215,201.20/135,414.09
  6. Step 6: Final answer
    x = 111,710.79

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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.