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Finding the Fourth Proportional to 78,380.40, 117,590.85 and 33,996.99

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Solution

The fourth proportional to 78,380.40, 117,590.85 and 33,996.99 is: 51,004.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,380.40 : 117,590.85 = 33,996.99 : x
  2. Step 2: Convert to fraction form
    78,380.40/117,590.85 = 33,996.99/x
  3. Step 3: Cross multiply
    78,380.40x = 117,590.85 × 33,996.99
  4. Step 4: Simplify right side
    78,380.40x = 3,997,734,951.54
  5. Step 5: Solve for x
    x = 3,997,734,951.54/78,380.40
  6. Step 6: Final answer
    x = 51,004.27

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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.