Home / 82,811.20-124,362.60-80,186.80

Finding the Fourth Proportional to 82,811.20, 124,362.60 and 80,186.80

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Solution

The fourth proportional to 82,811.20, 124,362.60 and 80,186.80 is: 120,421.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,811.20 : 124,362.60 = 80,186.80 : x
  2. Step 2: Convert to fraction form
    82,811.20/124,362.60 = 80,186.80/x
  3. Step 3: Cross multiply
    82,811.20x = 124,362.60 × 80,186.80
  4. Step 4: Simplify right side
    82,811.20x = 9,972,238,933.68
  5. Step 5: Solve for x
    x = 9,972,238,933.68/82,811.20
  6. Step 6: Final answer
    x = 120,421.38

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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.