Home / 81,379.20-122,155.08-72,079.56

Finding the Fourth Proportional to 81,379.20, 122,155.08 and 72,079.56

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Solution

The fourth proportional to 81,379.20, 122,155.08 and 72,079.56 is: 108,195.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,379.20 : 122,155.08 = 72,079.56 : x
  2. Step 2: Convert to fraction form
    81,379.20/122,155.08 = 72,079.56/x
  3. Step 3: Cross multiply
    81,379.20x = 122,155.08 × 72,079.56
  4. Step 4: Simplify right side
    81,379.20x = 8,804,884,418.16
  5. Step 5: Solve for x
    x = 8,804,884,418.16/81,379.20
  6. Step 6: Final answer
    x = 108,195.76

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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.