Home / 81,708.20-122,562.30-68,586.20

Finding the Fourth Proportional to 81,708.20, 122,562.30 and 68,586.20

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Solution

The fourth proportional to 81,708.20, 122,562.30 and 68,586.20 is: 102,879.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,708.20 : 122,562.30 = 68,586.20 : x
  2. Step 2: Convert to fraction form
    81,708.20/122,562.30 = 68,586.20/x
  3. Step 3: Cross multiply
    81,708.20x = 122,562.30 × 68,586.20
  4. Step 4: Simplify right side
    81,708.20x = 8,406,082,420.26
  5. Step 5: Solve for x
    x = 8,406,082,420.26/81,708.20
  6. Step 6: Final answer
    x = 102,879.30

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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.