Home / 80,810.20-121,215.30-73,811.80

Finding the Fourth Proportional to 80,810.20, 121,215.30 and 73,811.80

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Solution

The fourth proportional to 80,810.20, 121,215.30 and 73,811.80 is: 110,717.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,810.20 : 121,215.30 = 73,811.80 : x
  2. Step 2: Convert to fraction form
    80,810.20/121,215.30 = 73,811.80/x
  3. Step 3: Cross multiply
    80,810.20x = 121,215.30 × 73,811.80
  4. Step 4: Simplify right side
    80,810.20x = 8,947,119,480.54
  5. Step 5: Solve for x
    x = 8,947,119,480.54/80,810.20
  6. Step 6: Final answer
    x = 110,717.70

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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.