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Finding the Fourth Proportional to 65,678.44, 90,627.78 and 36,994.60

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Solution

The fourth proportional to 65,678.44, 90,627.78 and 36,994.60 is: 51,047.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,678.44 : 90,627.78 = 36,994.60 : x
  2. Step 2: Convert to fraction form
    65,678.44/90,627.78 = 36,994.60/x
  3. Step 3: Cross multiply
    65,678.44x = 90,627.78 × 36,994.60
  4. Step 4: Simplify right side
    65,678.44x = 3,352,738,469.99
  5. Step 5: Solve for x
    x = 3,352,738,469.99/65,678.44
  6. Step 6: Final answer
    x = 51,047.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.