Home / 81,215.10-121,740.86-33,856.41

Finding the Fourth Proportional to 81,215.10, 121,740.86 and 33,856.41

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Solution

The fourth proportional to 81,215.10, 121,740.86 and 33,856.41 is: 50,750.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,215.10 : 121,740.86 = 33,856.41 : x
  2. Step 2: Convert to fraction form
    81,215.10/121,740.86 = 33,856.41/x
  3. Step 3: Cross multiply
    81,215.10x = 121,740.86 × 33,856.41
  4. Step 4: Simplify right side
    81,215.10x = 4,121,708,469.91
  5. Step 5: Solve for x
    x = 4,121,708,469.91/81,215.10
  6. Step 6: Final answer
    x = 50,750.52

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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.