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Finding the Fourth Proportional to 75,850.50, 113,775.75 and 20,446.50

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Solution

The fourth proportional to 75,850.50, 113,775.75 and 20,446.50 is: 30,669.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,850.50 : 113,775.75 = 20,446.50 : x
  2. Step 2: Convert to fraction form
    75,850.50/113,775.75 = 20,446.50/x
  3. Step 3: Cross multiply
    75,850.50x = 113,775.75 × 20,446.50
  4. Step 4: Simplify right side
    75,850.50x = 2,326,315,872.38
  5. Step 5: Solve for x
    x = 2,326,315,872.38/75,850.50
  6. Step 6: Final answer
    x = 30,669.75

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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.