Home / 81,134.20-121,642.94-36,738.10

Finding the Fourth Proportional to 81,134.20, 121,642.94 and 36,738.10

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Solution

The fourth proportional to 81,134.20, 121,642.94 and 36,738.10 is: 55,080.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,134.20 : 121,642.94 = 36,738.10 : x
  2. Step 2: Convert to fraction form
    81,134.20/121,642.94 = 36,738.10/x
  3. Step 3: Cross multiply
    81,134.20x = 121,642.94 × 36,738.10
  4. Step 4: Simplify right side
    81,134.20x = 4,468,930,494.01
  5. Step 5: Solve for x
    x = 4,468,930,494.01/81,134.20
  6. Step 6: Final answer
    x = 55,080.72

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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.