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Finding the Fourth Proportional to 78,138.75, 117,227.57 and 22,734.75

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Solution

The fourth proportional to 78,138.75, 117,227.57 and 22,734.75 is: 34,107.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,138.75 : 117,227.57 = 22,734.75 : x
  2. Step 2: Convert to fraction form
    78,138.75/117,227.57 = 22,734.75/x
  3. Step 3: Cross multiply
    78,138.75x = 117,227.57 × 22,734.75
  4. Step 4: Simplify right side
    78,138.75x = 2,665,139,383.38
  5. Step 5: Solve for x
    x = 2,665,139,383.38/78,138.75
  6. Step 6: Final answer
    x = 34,107.78

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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.