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Finding the Fourth Proportional to 289,324.40, 433,986.60 and 76,091.90

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Solution

The fourth proportional to 289,324.40, 433,986.60 and 76,091.90 is: 114,137.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,324.40 : 433,986.60 = 76,091.90 : x
  2. Step 2: Convert to fraction form
    289,324.40/433,986.60 = 76,091.90/x
  3. Step 3: Cross multiply
    289,324.40x = 433,986.60 × 76,091.90
  4. Step 4: Simplify right side
    289,324.40x = 33,022,864,968.54
  5. Step 5: Solve for x
    x = 33,022,864,968.54/289,324.40
  6. Step 6: Final answer
    x = 114,137.85

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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.