Home / 81,016.82-121,289.88-47,179.68

Finding the Fourth Proportional to 81,016.82, 121,289.88 and 47,179.68

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Solution

The fourth proportional to 81,016.82, 121,289.88 and 47,179.68 is: 70,632.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,016.82 : 121,289.88 = 47,179.68 : x
  2. Step 2: Convert to fraction form
    81,016.82/121,289.88 = 47,179.68/x
  3. Step 3: Cross multiply
    81,016.82x = 121,289.88 × 47,179.68
  4. Step 4: Simplify right side
    81,016.82x = 5,722,417,725.64
  5. Step 5: Solve for x
    x = 5,722,417,725.64/81,016.82
  6. Step 6: Final answer
    x = 70,632.47

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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.