Home / 45,135.78-67,709.97-18,834.50

Finding the Fourth Proportional to 45,135.78, 67,709.97 and 18,834.50

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Solution

The fourth proportional to 45,135.78, 67,709.97 and 18,834.50 is: 28,254.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,135.78 : 67,709.97 = 18,834.50 : x
  2. Step 2: Convert to fraction form
    45,135.78/67,709.97 = 18,834.50/x
  3. Step 3: Cross multiply
    45,135.78x = 67,709.97 × 18,834.50
  4. Step 4: Simplify right side
    45,135.78x = 1,275,283,091.42
  5. Step 5: Solve for x
    x = 1,275,283,091.42/45,135.78
  6. Step 6: Final answer
    x = 28,254.37

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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.