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Finding the Fourth Proportional to 80,958.84, 120,624.29 and 76,431.75

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Solution

The fourth proportional to 80,958.84, 120,624.29 and 76,431.75 is: 113,879.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,958.84 : 120,624.29 = 76,431.75 : x
  2. Step 2: Convert to fraction form
    80,958.84/120,624.29 = 76,431.75/x
  3. Step 3: Cross multiply
    80,958.84x = 120,624.29 × 76,431.75
  4. Step 4: Simplify right side
    80,958.84x = 9,219,525,195.05
  5. Step 5: Solve for x
    x = 9,219,525,195.05/80,958.84
  6. Step 6: Final answer
    x = 113,879.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.