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Finding the Fourth Proportional to 66,905.90, 100,273.80 and 27,418.40

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Solution

The fourth proportional to 66,905.90, 100,273.80 and 27,418.40 is: 41,092.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,905.90 : 100,273.80 = 27,418.40 : x
  2. Step 2: Convert to fraction form
    66,905.90/100,273.80 = 27,418.40/x
  3. Step 3: Cross multiply
    66,905.90x = 100,273.80 × 27,418.40
  4. Step 4: Simplify right side
    66,905.90x = 2,749,347,157.92
  5. Step 5: Solve for x
    x = 2,749,347,157.92/66,905.90
  6. Step 6: Final answer
    x = 41,092.75

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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.