Home / 135,005.25-186,299.52-80,618.79

Finding the Fourth Proportional to 135,005.25, 186,299.52 and 80,618.79

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Solution

The fourth proportional to 135,005.25, 186,299.52 and 80,618.79 is: 111,249.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,005.25 : 186,299.52 = 80,618.79 : x
  2. Step 2: Convert to fraction form
    135,005.25/186,299.52 = 80,618.79/x
  3. Step 3: Cross multiply
    135,005.25x = 186,299.52 × 80,618.79
  4. Step 4: Simplify right side
    135,005.25x = 15,019,241,879.98
  5. Step 5: Solve for x
    x = 15,019,241,879.98/135,005.25
  6. Step 6: Final answer
    x = 111,249.32

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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.