Home / 81,563.20-122,188.80-55,138.24

Finding the Fourth Proportional to 81,563.20, 122,188.80 and 55,138.24

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Solution

The fourth proportional to 81,563.20, 122,188.80 and 55,138.24 is: 82,601.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,563.20 : 122,188.80 = 55,138.24 : x
  2. Step 2: Convert to fraction form
    81,563.20/122,188.80 = 55,138.24/x
  3. Step 3: Cross multiply
    81,563.20x = 122,188.80 × 55,138.24
  4. Step 4: Simplify right side
    81,563.20x = 6,737,275,379.71
  5. Step 5: Solve for x
    x = 6,737,275,379.71/81,563.20
  6. Step 6: Final answer
    x = 82,601.90

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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.