Home / 81,451.15-122,146.75-28,129.56

Finding the Fourth Proportional to 81,451.15, 122,146.75 and 28,129.56

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Solution

The fourth proportional to 81,451.15, 122,146.75 and 28,129.56 is: 42,183.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,451.15 : 122,146.75 = 28,129.56 : x
  2. Step 2: Convert to fraction form
    81,451.15/122,146.75 = 28,129.56/x
  3. Step 3: Cross multiply
    81,451.15x = 122,146.75 × 28,129.56
  4. Step 4: Simplify right side
    81,451.15x = 3,435,933,910.04
  5. Step 5: Solve for x
    x = 3,435,933,910.04/81,451.15
  6. Step 6: Final answer
    x = 42,183.98

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1.5x scale

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.