Home / 81,226.21-121,839.82-53,169.81

Finding the Fourth Proportional to 81,226.21, 121,839.82 and 53,169.81

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Solution

The fourth proportional to 81,226.21, 121,839.82 and 53,169.81 is: 79,755.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,226.21 : 121,839.82 = 53,169.81 : x
  2. Step 2: Convert to fraction form
    81,226.21/121,839.82 = 53,169.81/x
  3. Step 3: Cross multiply
    81,226.21x = 121,839.82 × 53,169.81
  4. Step 4: Simplify right side
    81,226.21x = 6,478,200,624.74
  5. Step 5: Solve for x
    x = 6,478,200,624.74/81,226.21
  6. Step 6: Final answer
    x = 79,755.06

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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.