Home / 81,273.85-121,918.97-30,660.17

Finding the Fourth Proportional to 81,273.85, 121,918.97 and 30,660.17

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Solution

The fourth proportional to 81,273.85, 121,918.97 and 30,660.17 is: 45,993.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,273.85 : 121,918.97 = 30,660.17 : x
  2. Step 2: Convert to fraction form
    81,273.85/121,918.97 = 30,660.17/x
  3. Step 3: Cross multiply
    81,273.85x = 121,918.97 × 30,660.17
  4. Step 4: Simplify right side
    81,273.85x = 3,738,056,727.87
  5. Step 5: Solve for x
    x = 3,738,056,727.87/81,273.85
  6. Step 6: Final answer
    x = 45,993.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.